MA Lobstermen's Association v. Wilbur Ross ( 2019 )


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  • United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued October 22, 2019            Decided December 27, 2019
    No. 18-5353
    MASSACHUSETTS LOBSTERMEN’S ASSOCIATION, ET AL.,
    APPELLANTS
    v.
    WILBUR ROSS, IN HIS OFFICIAL CAPACITY AS SECRETARY OF
    DEPARTMENT OF COMMERCE, ET AL.,
    APPELLEES
    Appeal from the United States District Court
    for the District of Columbia
    (No. 1:17-cv-00406)
    Jonathan Wood argued the cause for appellants. With him
    on the briefs were Damien M. Schiff and Joshua P. Thompson.
    Avi Kupfer, Attorney, U.S. Department of Justice, argued
    the cause for federal appellees. With him on the brief were
    Jeffrey Bossert Clark, Assistant Attorney General, Eric Grant,
    Deputy Assistant Attorney General, and Andrew C. Mergen
    and Robert J. Lundman, Attorneys.
    2
    Katherine Desormeau argued the cause for defendants-
    intervenors-appellees. With her on the brief were Ian Fein,
    Peter Shelley, and Roger Fleming.
    David J. Berger and Justin A. Cohen were on the brief for
    amici curiae Academic Scientists in support of appellees.
    Paul M. Thompson was on the brief for amici curiae
    Alison Rieser, et al. supporting defendant’s brief affirming the
    District Court.
    Nicholas A. DiMascio, Samantha R. Caravello, and Lori
    Potter were on the brief for amicus curiae National Audubon
    Society in support of appellees and supporting affirmance.
    Andrew J. Pincus was on the brief for amici curiae Senator
    Richard Blumenthal and Senator Brian Schatz in support of
    appellees and for affirmance of the District Court’s judgment.
    Douglas W. Baruch was on the brief for amici curiae
    Ocean and Coastal Law Professors in support of defendants-
    appellees    and   defendants-intervenors-appellees   and
    affirmation.
    Before: TATEL and MILLETT, Circuit Judges, and
    GINSBURG, Senior Circuit Judge.
    Opinion for the Court filed by Circuit Judge TATEL.
    TATEL, Circuit Judge: Acting pursuant to the Antiquities
    Act, 54 U.S.C. §§ 320301 et seq., President Obama established
    the Northeast Canyons and Seamounts Marine National
    Monument to protect “distinct geological features” and
    “unique ecological resources” in the northern Atlantic Ocean.
    Proclamation No. 9496, 3 C.F.R. 262, 262 (2017) (“Monument
    3
    Proclamation”). Several commercial-fishing associations
    challenged the creation of the Monument, arguing that the
    President exceeded his statutory authority. The district court
    disagreed and dismissed the complaint. With a minor
    alteration, we affirm.
    I.
    “[A] statute of historical importance for natural resource
    conservation and for archeological and historic preservation in
    the United States,” the Antiquities Act grew out of a movement
    to protect the nation’s unique historical, archeological, and
    scientific heritage. Bruce Babbitt, Introduction, in The Story of
    the Antiquities Act (Ronald F. Lee, 2001). “[B]eg[inning] in
    1879,” “[a] whole generation of dedicated . . . scholars,
    citizens, and members of Congress . . . through [their]
    explorations, publications, exhibits, and other activities,” 
    id. (internal quotation
    marks omitted), pushed for the enactment
    of “national preservation legislation,” culminating in 1906 with
    the passage of the Antiquities Act, Ronald F. Lee, The
    Antiquities Act, 1900–06, in The Story of the Antiquities Act
    (Ronald F. Lee, 2001). To this day, the Act remains “a major
    part of the legal foundation for archeological, historic, and
    natural conservation and preservation in the United States.”
    
    Babbitt, supra
    .
    The Act provides that “[t]he President may, in the
    President’s discretion, declare by public proclamation historic
    landmarks, historic and prehistoric structures, and other objects
    of historic or scientific interest that are situated on land owned
    or controlled by the Federal Government to be national
    monuments.” 54 U.S.C. § 320301(a). The Act also authorizes
    the “President [to] reserve parcels of land as a part of the
    national monuments,” so long as reservations are “confined to
    4
    the smallest area compatible with the proper care and
    management of the objects to be protected.” 
    Id. § 320301(b).
    Over the last century, Presidents have created a total of 158
    national monuments, protecting a wide range of the nation’s
    historic and scientific resources. National Park Service, List of
    National Monuments, https://www.nps.gov/archeology/sites/
    antiquities/monumentslist.htm. For example, President
    Theodore Roosevelt established the Grand Canyon National
    Monument, reserving some 800,000 acres of land in the
    Arizona desert to protect “the greatest eroded canyon within
    the United States.” Proclamation No. 794, 35 Stat. 2175, 2175
    (Jan. 11, 1908). More recently, President Clinton established
    the Hanford Reach National Monument in Washington to
    protect “the largest remnant of the shrub-steppe ecosystem that
    once blanketed the Columbia River Basin.” Proclamation No.
    7319, 3 C.F.R. 102, 102 (2001). And President George W.
    Bush created the Northwestern Hawaiian Islands Marine
    National Monument—later renamed the Papahānaumokuākea
    Marine National Monument, Proclamation No. 8112, 3 C.F.R.
    16, 16 (2008)—reserving nearly 140,000 square miles of ocean
    off the Hawaiian coast to protect the area’s “dynamic reef
    ecosystem, . . . home to many species of coral, fish, birds,
    marine mammals, and other flora and fauna.” Proclamation No.
    8031, 3 C.F.R. 67, 67 (2007).
    Continuing in that tradition, President Obama reserved
    roughly 5,000 square miles of ocean to create the Northeast
    Canyons and Seamounts Marine National Monument (“the
    Monument”). Monument Proclamation, 3 C.F.R. at 262. Lying
    some 130 miles southeast of Cape Cod, the Monument consists
    of two non-contiguous units. Id.; see infra Figure 1. The first
    covers three underwater canyons that “start at the edge of the
    geological continental shelf and drop from 200 meters to
    thousands of meters deep.” Monument Proclamation, 3 C.F.R.
    5
    at 262. The second covers four extinct undersea volcanoes—
    called seamounts—that rise “thousands of meters from the
    ocean floor.” 
    Id. “Because of
    the steep slopes of the canyons
    and seamounts, oceanographic currents that encounter them
    create . . . upwelling” that “lift[s] nutrients . . . from the deep to
    sunlit surface waters,” fueling “an eruption of [plankton] that
    form[s] the base of the food chain.” 
    Id. at 262–63.
    “Together
    the geology, currents, and productivity create diverse and
    vibrant ecosystems” home to assorted marine flora and fauna,
    including rare species of deep-sea corals. 
    Id. at 263.
    Accordingly, the Monument protects both “the canyons and
    seamounts themselves” as well as “the natural resources and
    ecosystems in and around them.” 
    Id. at 262.
    Significantly for the issue before us, the Monument lies
    entirely in the U.S. Exclusive Economic Zone (“EEZ”), the belt
    of ocean between 12 and 200 nautical miles off the nation’s
    coasts over which the United States exercises dominion under
    international law. See Restatement (Third) of Foreign Relations
    Law § 511(d), cmt. b (“Restatement”) (explaining that costal
    states exercise sovereign rights over their exclusive economic
    zones). President Reagan created the U.S. EEZ in 1983 by
    issuing a proclamation that claimed for the United States
    sovereign rights for the purpose of exploring,
    exploiting, conserving and managing natural
    resources, both living and non-living, of the
    seabed and subsoil and the superjacent waters
    and with regard to other activities for the
    economic exploitation and exploration of the
    zone, such as the production of energy from the
    water, currents and winds; and [] jurisdiction
    with regard to the establishment and use of
    artificial islands, and installations and structures
    6
    having economic purposes, and the protection
    and preservation of the marine environment.
    Proclamation No. 5030, 3 C.F.R. 22, 23 (1984) (“Reagan
    Proclamation”). “The United States . . . exercise[s] these
    sovereign rights and jurisdiction in accordance with the rules
    of international law.” 
    Id. Consistent with
    that authority and pursuant to several
    statutes, the federal government regulates a range of activity in
    the U.S. EEZ. The National Marine Sanctuaries Act, 16 U.S.C.
    §§ 1431 et seq. (“Sanctuaries Act”), authorizes the federal
    government to designate and manage marine sanctuaries in the
    “United States exclusive economic zone.” 
    Id. § 1437(k).
    The
    Magnuson-Stevens Fishery Conservation and Management
    Act, 16 U.S.C. §§ 1801 et seq., empowers the federal
    government to “exercise[] sovereign rights for the purposes of
    exploring, exploiting, conserving, and managing all fish,
    within the exclusive economic zone.” 
    Id. § 1801(b)(1).
    And the
    Outer Continental Shelf Lands Act, 43 U.S.C. §§ 1331 et seq.,
    provides a framework for the federal government to exploit the
    seabed’s natural resources within the “outer Continental
    Shelf,” defined to include the U.S. EEZ. 
    Id. § 1331(a);
    see 
    id. (defining the
    “outer Continental Shelf” as “all submerged
    lands” beyond the lands reserved to the States up to the edge of
    the United States’ “jurisdiction and control”); see also Dep’t of
    the Interior, Office of the Solicitor, Authority to Issue Outer
    Continental Shelf Mineral Leases in the Gorda Ridge Area, 92
    Interior Dec. 459, 487 (May 30, 1985) (explaining that the
    statutory definition of “outer Continental Shelf” includes the
    submerged lands within the EEZ).
    In this case, several commercial-fishing associations (“the
    Fishermen”) challenged the Monument’s designation, arguing
    that the President “exceeded his statutory authority” under the
    7
    Act because (1) the ocean is not “land” under the Antiquities
    Act; (2) the Monument is not compatible with the Sanctuaries
    Act; (3) the U.S. EEZ is not “controlled” by the federal
    government; and (4) the area reserved is not the “smallest area
    compatible” with management. Massachusetts Lobstermen’s
    Association v. Ross, 
    349 F. Supp. 3d 48
    , 51, 58 (D.D.C. 2018).
    Several conservation groups intervened to defend the
    Monument. 
    Id. at 51.
    The district court concluded that the President acted within
    his statutory authority in creating the Monument and dismissed
    the Fishermen’s claims. 
    Id. It first
    rejected the Fishermen’s
    argument that the Monument “is per se invalid because it lies
    entirely in the ocean,” explaining that “Supreme Court
    precedent, executive practice, and ordinary meaning” establish
    that the Act reaches submerged land. 
    Id. at 55–56.
    Second, the
    district court found that the President’s interpretation of “the
    Antiquities Act does not render the Sanctuaries Act redundant”
    because the two statutes “address environmental
    conservation . . . in different ways and to different ends.” 
    Id. at 59.
    Third, the court found that the federal government
    “adequately controls the EEZ for purposes of the Act,” 
    id. at 60,
    not only because it “exercises substantial general authority
    over the EEZ” and “possesses specific authority to regulate the
    EEZ for purposes of environmental conservation,” but also
    because “no private person or sovereign entity rivals the federal
    government’s dominion over the EEZ,” 
    id. at 64.
    And finally,
    the district court addressed the Fishermen’s “fact-specific
    arguments about the boundaries of the Monument,” observing
    that “to obtain judicial review of claims about a monument’s
    size, plaintiffs must offer specific, nonconclusory factual
    allegations establishing a problem with its boundaries” and that
    the Fishermen’s “allegations here d[id] not rise to that level.”
    
    Id. at 67.
                                    8
    On appeal, the Fishermen press the same claims as they
    did in the district court: that the Monument is not “land,” not
    compatible with the Sanctuaries Act, not “controlled” by the
    federal government, and not the “smallest area compatible”
    with management.
    II.
    Our court set out a framework for reviewing challenges to
    national monument designations in two companion cases,
    Mountain States Legal Foundation v. Bush, 
    306 F.3d 1132
    (D.C. Cir. 2002), and Tulare County v. Bush, 
    306 F.3d 1138
    (D.C. Cir. 2002). There, we drew a distinction between two
    types of claims: those justiciable on the face of the
    proclamation and those requiring factual development. The
    former are resolved “as a matter of law” because they turn on
    questions of statutory interpretation. 
    Tulare, 306 F.3d at 1140
    .
    As for the latter, although the precise “scope of judicial review”
    remains an open question, at a minimum, plaintiffs’ pleadings
    must contain plausible factual allegations identifying an aspect
    of the designation that exceeds the President’s statutory
    authority. Mountain 
    States, 306 F.3d at 1133
    . The Fishermen’s
    first three claims—that the Monument is not “land,” not
    compatible with the Sanctuaries Act, and not “controlled” by
    the federal government—can be judged on the face of the
    proclamation and resolved as a matter of law. Their last claim
    requires plausible factual allegations that the Monument is not
    the “smallest area compatible” with management to survive
    dismissal. We consider each in turn.
    A.
    The Fishermen first contend that the Monument is invalid
    because it “is not land, as that term is ordinarily understood.”
    Appellants’ Br. 22. This argument need not detain us long
    because, as the district court explained, the Supreme Court has
    9
    consistently held that the Antiquities Act reaches submerged
    lands and the waters associated with them. In Cappaert v.
    United States, 
    426 U.S. 128
    (1976), the Court determined that
    the Antiquities Act “g[a]ve the President authority to reserve”
    Devil’s Hole—an underground pool of water near Death
    Valley that housed a rare species of fish—as part of Death
    Valley National Monument, rejecting the contention that the
    Act protected “archeologic sites” only. 
    Id. at 141–42.
    The
    Court emphatically extended the point in United States v.
    California, 
    436 U.S. 32
    (1978): “[t]here can be no serious
    question that the President . . . had power under the Antiquities
    Act to reserve the submerged lands and waters” of Channel
    Islands National Monument. 
    Id. at 36.
    “Although the
    Antiquities Act refers to ‘lands,’” the Court explained, “it also
    authorizes the reservation of waters located on or over federal
    lands.” 
    Id. at 36
    n.9. And in Alaska v. United States, 
    545 U.S. 75
    (2005), which concerned Glacier Bay National Monument,
    the Court again made clear that “the Antiquities Act empowers
    the President to reserve submerged lands.” 
    Id. at 103.
    The Fishermen insist that the Supreme Court’s
    pronouncements in Cappaert, California, and Alaska are non-
    binding dicta because, they say, the cases concerned only
    whether Presidents intended to include submerged lands in
    their proclamations, not whether they had the authority to do
    so. The Fishermen are mistaken. At least in Alaska, the
    Supreme Court’s holding expressly included its determination
    that the Antiquities Act reaches submerged lands. “[A]
    necessary part of [its] reasoning,” the Court explained, was that
    “in creating Glacier Bay National Monument the United States
    had reserved the submerged lands underlying Glacier Bay and
    the remaining waters within the monument’s 
    boundaries.” 545 U.S. at 100
    –01. Had the President lacked authority to reserve
    the submerged lands in the first place, the Court would have
    had no reason to inquire into whether he had, in fact, intended
    10
    to do so. Cf. United States v. Windsor, 
    570 U.S. 744
    , 759 (2013)
    (explaining that legal conclusions that are “necessary
    predicate[s]” to a court’s holding are “not dictum”). In any
    event, “even if technically dictum,” “carefully considered
    language of the Supreme Court . . . generally must be treated
    as authoritative.” Sierra Club v. EPA, 
    322 F.3d 718
    , 724 (D.C.
    Cir. 2003) (internal quotation marks omitted).
    Although the parties advanced, and the district court
    considered, other arguments about whether the Act reaches
    submerged lands—including arguments about historic practice
    and ordinary meaning—we need not wade into those waters, so
    to speak. On-point Supreme Court precedent resolves this
    claim.
    B.
    The Fishermen next argue that interpreting the Antiquities
    Act to permit ocean-based monuments would render the
    Sanctuaries Act “a practical nullity.” Appellants’ Br. 27.
    Congress enacted the Sanctuaries Act “to identify and
    designate as national marine sanctuaries areas of the marine
    environment which are of special national significance and to
    manage these areas as the National Marine Sanctuary System.”
    16 U.S.C. § 1431(b)(1). Because past conservation efforts
    “ha[d] been directed almost exclusively to land areas above the
    high-water mark,” Congress crafted the Sanctuaries Act to
    “complement[] existing regulatory authorities” by protecting
    “certain areas of the marine environment possess[ing]
    conservation, recreational, ecological, historical, scientific,
    educational, cultural, archeological, or esthetic qualities.” 
    Id. § 1431(a)(1),
    (a)(2), (b)(2). To that end, the Sanctuaries Act
    empowers the Secretary of Commerce to “designate any
    discrete area of the marine environment as a national marine
    sanctuary and promulgate regulations implementing the
    11
    designation,” 
    id. § 1433,
    but only after complying with certain
    procedural requirements, 
    id. §§ 1433–1434.
    According to the Fishermen, by setting out a specific
    process to protect marine environments, the Sanctuaries Act
    precludes Presidents from using the Antiquities Act to do the
    same. As the Fishermen see it, a President’s use of the
    Antiquities Act to create marine monuments renders the
    Sanctuaries Act “entirely redundant” because “[a]ny area that
    could be designated as a marine sanctuary could be more easily
    designated as an ocean monument . . . with the latter approach
    evading all of the substantive and procedural requirements of
    the former.” Appellants’ Br. 25, 29.
    The Fishermen are again mistaken. Applying the
    Antiquities Act to oceans does not nullify the Sanctuaries Act
    for a simple reason: the two statutory schemes differ in several
    critical respects. Whereas the Antiquities Act limits national
    monuments to the “smallest area compatible” with monument
    management, 54 U.S.C. § 320301(b), the Sanctuaries Act
    permits marine sanctuaries to occupy an area of any size “that
    will permit comprehensive and coordinated conservation and
    management,” 16 U.S.C. § 1433(a)(5). Whereas the Antiquities
    Act protects “objects of historic or scientific interest,” 54
    U.S.C. § 320301(a), the Sanctuaries Act protects areas’
    “recreational,” “cultural,” or “human-use values,” 16 U.S.C.
    § 1433(a)(2). And whereas the Antiquities Act focuses on
    protecting specific “objects” of historic or scientific interest, 54
    U.S.C. § 320301(a), the Sanctuaries Act focuses on designating
    and managing “areas as the National Marine Sanctuary
    System,” 16 U.S.C. § 1431(b)(1). Thus, a marine sanctuary
    may be larger, protect more diverse values, and serve different
    overall goals than an ocean-based monument.
    12
    Indeed, we rejected a nearly identical argument in
    Mountain States, where the challengers asserted that the
    President’s designation of six national monuments in the
    western United States “def[ied] congressional intent regarding
    the scope and purpose of ‘a host’ of other statutes enacted to
    protect various archeological and environmental 
    values.” 306 F.3d at 1138
    . We disagreed, explaining that the “contention
    that the Antiquities Act must be narrowly construed in accord
    with [the challengers’] view of Congress’s original intent
    [regarding those statutes] misse[d] the mark” because it
    “misconceive[d] federal laws as not providing overlapping
    sources of protection” for environmental values. 
    Id. The same
    is true here: that the Antiquities and Sanctuaries Acts
    “provid[e] overlapping sources of protection” for marine
    environments neither requires the Antiquities Act to “be
    narrowly construed” nor “def[ies] congressional intent
    regarding the scope and purpose of [the Sanctuaries Act].” 
    Id. Contrary to
    the Fishermen’s contentions, then, ocean-
    based monuments are perfectly compatible with the
    Sanctuaries Act.
    C.
    Next, the Fishermen argue that the Monument is invalid
    because the federal government does not control the area of
    ocean where it is located. Recall that the statute gives the
    President monument-creating authority over “land owned or
    controlled by the Federal Government.” 54 U.S.C.
    § 320301(a). According to the Fishermen, by pairing “owned”
    with “controlled,” Congress intended the two words to have
    similar meanings, such that to “control[]” an area the federal
    government’s authority there must be akin to its authority over
    federally “owned” land. And, the Fishermen continue, the
    13
    federal government lacks control, so understood, over the U.S.
    EEZ.
    Once more, the Fishermen misread the statute. Generally,
    “[c]ontrol and ownership . . . are distinct concepts.” Dole Food
    Co. v. Patrickson, 
    538 U.S. 468
    , 477 (2003). Congress made
    that distinction plain here by separating “controlled” and
    “owned” with the conjunction “or,” signaling that “the
    words . . . are to be given separate meanings.” United States v.
    Woods, 
    571 U.S. 31
    , 45 (2013) (internal quotation marks and
    citations omitted). Nothing about the proximity of “owned” to
    “controlled” changes that: “[t]hat a word may be known by the
    company it keeps is . . . not an invariable rule, for the word may
    have a character of its own not to be submerged by its
    association.” Graham County Soil & Water Conservation
    District v. U.S. ex rel. Wilson, 
    559 U.S. 280
    , 288 (2010)
    (quoting Russell Motor Car Co. v. United States, 
    261 U.S. 514
    ,
    519 (1923)). Accordingly, the federal government may
    “control[]” land even if it lacks authority akin to ownership
    there. And, here, three factors convince us that the federal
    government exercises sufficient authority to “control[]” the
    U.S. EEZ for purposes of the Act.
    First, “under international law,” the federal government
    exerts “significant” “authority to exercise restraining and
    directing influence over the EEZ.” Administration of Coral
    Reef Resources in the Northwest Hawaiian Islands, 24 Op.
    O.L.C. 183, 196–97 (2000) (“OLC Op.”). That power includes
    “substantial authority” to achieve the specific goal advanced
    here: “protecting the marine environment.” 
    Id. at 197.
    Second, the federal government possesses substantial
    authority over the EEZ under domestic law. As noted, supra at
    6, the Reagan Proclamation established U.S. sovereign
    dominion over the EEZ “for the purpose of exploring,
    14
    exploiting, conserving and managing natural resources, both
    living and non-living, of the seabed and subsoil and the
    superjacent waters,” as well as “jurisdiction with regard to . . .
    the protection and preservation of the marine environment.”
    Reagan Proclamation, 3 C.F.R. at 23. Consistent with that
    authority, Congress has enacted several statutes regulating
    extraction and conservation activities in the EEZ, including the
    Sanctuaries Act, the Magnuson-Stevens Act, and the Outer
    Continental Shelf Lands Act.
    And finally, the federal government exercises unrivaled
    authority over the EEZ. Although other nations may exercise
    “the freedoms of navigation and overflight” as well as the
    “freedom to lay submarine cables and pipelines” in the EEZ,
    Restatement § 514(2), no other entity matches the “extensive”
    “restraining and directing influence” exerted by the federal
    government, OLC Op. at 196–97. No private entity owns any
    portion of the EEZ, and no public entity possesses equivalent
    sovereign rights there. Indeed, the Supreme Court recently
    explained that “the Federal Government exercise[s] exclusive”
    authority over this portion of the ocean. Parker Drilling
    Management Services, Ltd. v. Newton, 
    139 S. Ct. 1881
    , 1887
    (2019).
    The federal government’s unrivaled authority under both
    international and domestic law establishes that it “control[s]”
    the EEZ for purposes of the Act. The Fishermen’s remaining
    arguments to the contrary are unavailing.
    The Fishermen first invoke Treasure Salvors, Inc. v. The
    Unidentified Wrecked & Abandoned Sailing Vessel, 
    569 F.2d 330
    (5th Cir. 1978), where the Fifth Circuit held that the
    remains of a newly-discovered shipwreck “on the continental
    shelf, outside the territorial waters of the United States” was
    “not situated on lands owned or controlled by the United States
    15
    under the provisions of the Antiquities Act.” 
    Id. at 333
    n.1, 340.
    The Fishermen argue that Treasure Salvors’ “logic requires the
    same conclusion in this case: that the [M]onument is not
    located on land owned or controlled by the federal
    government.” Appellants’ Br. 51. But Treasure Salvors
    predated the Reagan Proclamation and thus never addressed
    whether the federal government exercises control over the U.S.
    EEZ. Accordingly, the decision carries no significance here.
    Lastly, warning of a slippery slope, the Fishermen insist
    that if the Act reaches the EEZ, then it also reaches “areas
    clearly meant to be excluded, such as state and private lands.”
    Appellants’ Reply Br. 32. But no such danger lurks in the
    shadows of this opinion. The federal government controls the
    EEZ, in part, because no other entity—public or private—
    exerts competing influence there; the federal government’s
    authority is “exclusive.” 
    Parker, 139 S. Ct. at 1887
    . That,
    however, is not true of state and private lands, where other
    entities—namely, states and private parties—possess
    competing authority, weakening any federal government claim
    to exercise control over such lands.
    D.
    This brings us to the Fishermen’s final argument: that the
    Monument is not, as required by the Act, the “smallest area
    compatible” with management. 54 U.S.C. § 320301(b). In
    Tulare County, we set forth the type of allegations required to
    make out such a claim. That case concerned Giant Sequoia
    National Monument, which protects “groves of giant sequoias,
    the world’s largest trees, and their surrounding ecosystem.”
    Tulare 
    County, 306 F.3d at 1140
    . Challengers questioned the
    monument’s boundaries, arguing that they were larger than
    necessary because “[s]equoia groves comprise[d] only six
    percent of the [m]onument[’s]” area. Tulare County v. Bush,
    16
    
    317 F.3d 227
    , 227 (D.C. Cir. 2003) (per curiam). We
    concluded that the challengers failed to state a claim because
    the proclamation protected “natural resources present
    throughout the [m]onument area,” meaning “[i]t was . . .
    incumbent upon [the challengers] to allege that some part of
    the [m]onument did not, in fact, contain natural resources that
    the President sought to protect.” 
    Id. The six-percent
    allegation,
    we speculated, “might well have been sufficient if the President
    had identified only [s]equoia groves for protection, but he did
    not,” id.; he also protected “their surrounding ecosystem,”
    Tulare 
    County, 306 F.3d at 1140
    .
    The Fishermen’s pleadings are similarly insufficient. They
    allege only that the Monument reserves large areas of
    submerged land beyond the canyons and seamounts. Although
    those allegations “might well have been sufficient if the
    President had identified only [the canyons and seamounts] for
    protection, . . . he did not.” Tulare 
    County, 306 F.3d at 227
    .
    Instead, the Monument protects not only “the canyons and
    seamounts themselves,” but also “the natural resources and
    ecosystems in and around them.” Monument Proclamation, 3
    C.F.R. at 262 (emphasis added). “It was therefore incumbent
    upon [the Fishermen] to allege that some part of the Monument
    did not, in fact, contain natural resources that the President
    sought to protect.” Tulare 
    County, 306 F.3d at 227
    . The
    Fishermen failed to do so: the complaint contains no factual
    allegations identifying a portion of the Monument that lacks the
    natural resources and ecosystems the President sought to
    protect.
    Grasping at straws, the Fishermen assert that “[a]n
    ecosystem is not an ‘object’ under the Antiquities Act.” Compl.
    ¶ 75, Joint Appendix 24–25. In Tulare County, however, we
    expressly held that ecosystems are protectable “objects” under
    the Act: “[i]nclusion of such items as ecosystems . . . in the
    17
    Proclamation did not contravene the terms of the statute by
    relying on nonqualifying 
    features.” 306 F.3d at 1142
    ; cf.
    
    Alaska, 545 U.S. at 99
    (explaining that the President “create[d]
    Glacier Bay National Monument,” in part, to protect “the
    complex ecosystem of Glacier Bay”). Accordingly, the
    Fishermen’s smallest-area claim fails.
    III.
    We end with a housekeeping matter. Although the district
    court properly found that the Fishermen “failed to demonstrate
    that the President acted outside his statutory authority” in
    creating the Monument, it deemed such failure “jurisdictional”
    and dismissed the complaint “under Rule 12(b)(1), rather
    than Rule 12(b)(6).” Lobstermen’s Association, 
    349 F. Supp. 3d
    at 55. To be fair, we have been less than precise about the
    basis for dismissing Antiquities Act cases. See, e.g., Tulare
    
    County, 306 F.3d at 1140
    (dismissing “for lack of subject
    matter jurisdiction and for failure to state a claim upon which
    relief may be granted pursuant to Federal Rules of Civil
    Procedure 12(b)(1) and 12(b)(6)”). We now clarify that where,
    as here, plaintiffs fail to make out legally sufficient claims
    challenging national monument designations, those claims
    should be dismissed pursuant to Rule 12(b)(6). Because district
    courts possess subject-matter jurisdiction over challenges to
    Antiquities Act designations under 28 U.S.C. § 1331, dismissal
    of such challenges pursuant to Rule 12(b)(1) is inappropriate.
    See Trudeau v. FTC, 
    456 F.3d 178
    , 185 (D.C. Cir. 2006)
    (explaining that where litigants challenge the executive’s
    exercise of statutory authority, “[s]ection 1331 is an
    appropriate source of jurisdiction”). Accordingly, “[a]lthough
    the district court erroneously dismissed the action pursuant to
    Rule 12(b)(1), we c[an]”—and do—“nonetheless affirm” the
    district court’s dismissal of the Fishermen’s complaint “based
    on failure to state a claim under Federal Rule of Civil Procedure
    18
    12(b)(6).” EEOC v. St. Francis Xavier Parochial School, 
    117 F.3d 621
    , 624 (D.C. Cir. 1997).
    So ordered.
    Figure 1