Andy Murch / Little gulper shark (Centrophorus uyato). Cape Eleuthera, Bahamas.

Shane Gross / Lemon shark juvenile (Negaprion brevirostris) swimming in mangrove habitat near blue crab (Callinectes sapidus), a prey species for the shark. Eleuthera, Bahamas.

Shane Gross / Lemon shark juvenile (Negaprion brevirostris) trying to feed on the leaves of a red mangrove (Rhizophora mangle). As pups, the sharks have to learn to hunt for themselves and sometimes make mistakes....

Shane Gross / Green sea turtle (Chelonia mydas) swimming over sand ripples, Eleuthera, Bahamas.

Shane Gross / Green sea turtle (Chelonia mydas) near the surface in shallow water, Eleuthera, Bahamas.

Shane Gross / Common octopus (Octopus vulgaris) hunting on a reef off Eleuthera Island, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) portrait at night, Eleuthera, Bahamas.

Shane Gross / Caribbean reef squid (Sepioteuthis sepioidea) portrait reflecting off the surface of the ocean at night, Eleuthera, Bahamas.

Shane Gross / Red mangrove (Rhizophora mangle) habitat with shoal of Silversides (Atherinomorus lacunosus), Eleuthera, Bahamas. August.

Shane Gross / A Bottlenose dolphin (Tursiops truncatus), heavily scarred, possibly from shark attacks, on sand bank off Eleuthera, Bahamas.

Shane Gross / Green sea turtle (Chelonia mydas) resting in a coral reef. Eleuthera, Bahamas.

Shane Gross / Bottlenose dolphin (Tursiops truncatus) underwater playing in the shallows off Eleuthera, Bahamas.

Shane Gross / Bottlenose dolphin (Tursiops truncatus) underwater rubbing herself on a sponge off Eleuthera, Bahamas.

Shane Gross / Graysby fish (Cephalopholis cruentata) a type of grouper, hiding in a sponge off Eleuthera, Bahamas.

Shane Gross / Queen conch (Lobatus gigas) juvenile feeding on algae growing on Seagrass (Thalassia testudinum) blades. Eleuthera, Bahamas.

Shane Gross / Nurse sharks (Ginglymostoma cirratum) two in a courtship dance at sunrise in a mangrove area near Eleuthera, Bahamas.

Shane Gross / Lemon shark pup (Negaprion brevirostris) in mangrove forest which acts as a nursery for juveniles of this species. Eleuthera, Bahamas.

Shane Gross / Lemon shark pup (Negaprion brevirostris) in mangrove forest which acts as a nursery for juveniles of this species. Eleuthera, Bahamas.

Shane Gross / Lemon shark pup (Negaprion brevirostris) in mangrove forest which acts as a nursery for juveniles of this species. Eleuthera, Bahamas.

Shane Gross / Lemon shark pup (Negaprion brevirostris) in mangrove forest which acts as a nursery for juveniles of this species. Eleuthera, Bahamas.

Shane Gross / Red mangrove (Rhizophora mangle) habitat with shoal of Silversides (Atherinomorus lacunosus), Eleuthera, Bahamas.

Shane Gross / Red mangrove (Rhizophora mangle) habitat with shoal of Silversides (Atherinomorus lacunosus), Eleuthera, Bahamas.

Shane Gross / Grey snapper fish (Lutjanus griseus) hunting Silversides (Atherinomorus lacunosus) among red mangrove (Rhizophora mangle) roots, Eleuthera, Bahamas.

Andy Murch / Little gulper shark (Centrophorus uyato). Cape Eleuthera, Bahamas.

Andy Murch / Little gulper shark (Centrophorus uyato). Cape Eleuthera, Bahamas.

Andy Murch / Blackfin gulper shark (Centrophorus isodon). Cape Eleuthera, Bahamas.

Andy Murch / Blackfin gulper shark (Centrophorus isodon). Cape Eleuthera, Bahamas.

Andy Murch / Blackfin gulper shark (Centrophorus isodon). Cape Eleuthera, Bahamas.

Andy Murch / Blackfin gulper shark (Centrophorus isodon). Cape Eleuthera, Bahamas.

Andy Murch / Atlantic sixgill shark (Hexanchus vitulus) descending with open mouth. Cape Eleuthera, Bahamas.

Andy Murch / Atlantic sixgill shark (Hexanchus vitulus). Cape Eleuthera, Bahamas.

Andy Murch / Atlantic sixgill shark (Hexanchus vitulus) swimming with open mouth. Cape Eleuthera, Bahamas.

Andy Murch / Atlantic sixgill shark (Hexanchus vitulus). Cape Eleuthera, Bahamas.

Shane Gross / Schoolmaster snapper (Lutjanus apodus) amongst Red mangrove (Rhizophora mangle), Turtlegrass (Thalassia testudinum) in foreground. Eleuthera Island, Bahamas.

Shane Gross / Schoolmaster snapper (Lutjanus apodus) swimming amongst Red mangrove (Rhizophora mangle), Turtlegrass (thalassia testudinum) in foreground. Eleuthera Island, Bahamas.

Shane Gross / Propeller scar on sea floor, damage to the root structure of Seagrass can lead to erosion of Seagrass bed. Eleuthera, Bahamas.

Shane Gross / Turtlegrass (Thalassia testudinum), close up comparison of leaves from seagrass bed in clean water and dirty water. Eleuthera, Bahamas.

Shane Gross / Green sea turtle (Chelonia mydas) swimming towards surface to breathe, over Turtlegrass (Thalassia testudinum) seagrass bed. Eleuthera, Bahamas.

Shane Gross / Lemon shark juvenile (Negaprion brevirostris) swimming in mangrove habitat, surrounded by smaller fish species, prey for the shark. Eleuthera, Bahamas.

Shane Gross / Shark biologist Ian Bouyoucos and education programme assistant Cameron Raguse from the Cape Eluthera Institute release two juvenile lemon sharks (Negaprion brevirostris) back into the wild. The shark...

Shane Gross / Researcher Ian Bouyoucos of the Cape Eleuthera Institute in The Bahamas releasing Lemon shark (Negaprion brevirostris) pup into his temporary enclosure. The shark will be observed to help us better un...

Shane Gross / Lemon shark pups (Negaprion brevirostris) in mangrove forest, Eleuthera, Bahamas.

Shane Gross / Lemon shark(Negaprion brevirostris) pup, these spend the first 5-8 years of their life in mangrove forests. Eleuthera, Bahamas

Shane Gross / Lemon shark pups (Negaprion brevirostris) spend the first 5-8 years of their life in mangrove forests. Eleuthera, Bahamas.

Shane Gross / Lemon shark pup (Negaprion brevirostris) in a research tank at the Cape Eleuthera Institute, The Bahamas

Shane Gross / A True tulip (Fasciolaria tulipa) snail at night, Eleuthera, Bahamas. February.

Shane Gross / Spotted trunkfish (Lactophrys bicaudalis) portrait, Eleuthera, Bahamas.

Shane Gross / A Midnight parrotfish (Scarus coelestinus) feeding on algae off Eleuthera Island in The Bahamas.