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2,814 species in Dry Tortugas National Park
Pyrgocythara filosa
Rhizoclonium tortuosum
Rhizophora mangle
Rocellaria dubia
Rocinela signata
Sargassum acinarium
Saurida brasiliensis
Scaphander watsoni
Schwartziella catesbyana
Scolymia lacera
Scyllarus americanus
Semelina nuculoides
Serranus annularis
Serratina aequistriata
Sesbania sericea
Setarches guentheri
Sicyonia brevirostris
Sipunculus nudus
Skogsbergia lerneri
Solecurtus cumingianus
Sphoeroides testudineus
Sphyrna lewini
Spiochaetopterus costarum
Stegastes fuscus
Strombus pugilis
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