Juergen Freund / Diver on coral reef near Brain coral, Caribbean

Alex Mustard / Two Ruby brittlestars (Ophioderma rubicundum) climbing a Symmeterical brain coral (Pseudodiploria strigosa) as it spawns at night in order to feed on the coral eggs, East End, Grand Cayman, Cayman Isl...

Alex Mustard / A Ruby brittle star (Ophioderma rubicundum) feeding on the spawn from a Symmeterical brain coral (Pseudodiploria strigosa), East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Ruby brittle star (Ophioderma rubicundum) climbing on top of a mountainous star coral (Montastraea faveolata) as it prepares to spawn at night, East End, Grand Cayman, Cayman Islands, British West Ind...

Alex Mustard / Ruby brittle star (Ophioderma rubicundum) climbing on top of a mountainous star coral (Montastraea faveolata) as it prepares to spawn at night, East End, Grand Cayman, Cayman Islands, British West Ind...

Alex Mustard / Three Ruby brittlestars (Ophioderma rubicundum) climbing a Symmeterical brain coral (Pseudodiploria strigosa) as it spawns at night in late summer. East End, Grand Cayman, Cayman Islands, British West...

Alex Mustard / A Caribbean reef octopus (Octopus briareus) swimming through spawning Sea rods (Pseudoplexaura) at night, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / A Black sea rod (Plexaura homomalla) spawning at night, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Triplefin (Enneanectes sp) between the polyps of a great star coral (Montastraea cavernosa) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Grey angelfish (Pomacanthus arcuatus) swimming over a colony of great star coral (Montastrea cavernosa) Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Tim Laman / Giant anemone {Condylactis gigantea} amongst the roots of Red Mangrove trees {Rhizophora mangle} in the Belize Cays, Tunicate Cove, Belize.

Tim Laman / Giant anemone {Condylactis gigantea}, Snapper fish {Lutjanidae}, sponges, tunicates and other invertebrates amongst the roots of Red Mangrove trees {Rhizophora mangle} in the Belize Cays, Tunicate Cov...

Tim Laman / Giant anemone {Condylactis gigantea}, sponges, tunicates and other invertebrate life growing on the roots of Red Mangrove trees {Rhizophora mangle} in the Belize Cays, Tunicate Cove, Belize.

Juergen Freund / Diver behind large Sea fan coral, Cuba, Caribbean

Juergen Freund / Close up detail of Venus sea fan {Gorgonia flabellum} Caribbean

Juergen Freund / Diamond blenny {Malacoctenus boehlkei} amongst tentacles of Sea anemone, Caribbean

Juergen Freund / Diamond blenny {Malacoctenus boehlkei} amongst tentacles of Sea anemone, Caribbean

Juergen Freund / Upside down jellyfish {Cassiopeia) Caribbean

Roberto Rinaldi / Brain coral (Diplora sp), Cayman Islands.

Roberto Rinaldi / Vase sponge (Niphates digitalis) with diver, Roatan, Honduras.

Roberto Rinaldi / Giant tube sponges (Agelas sp), Honduras.

Roberto Rinaldi / Yellowline arrow crab (Stenorhynchus seticornis), on white gorgonian sea fan / lace sea fan (Eunicella singularis), Cayos Cochinos, Honduras.