Alex Mustard / A diver exploring a coral reef with formation of brown tube sponges (Agelas conifera) red rope sponges (Amphimedon compressa) and deepwater sea fans (Iciligorgia nodulifera) East End, Grand Cayman, Ca...

Alex Mustard / Neck crab (Podochela sp.) lives cryptically on a deepwater sea fan (Iciligorgia nodulifera). East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Red clingfish (Arcos rubiginosus) pair blend in with their host, a deepwater sea fan (Iciligorgia nodulifera) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Red clingfish (Arcos rubiginosus) living on a deepwater sea fan (Iciligorgia nodulifera) on the reef wall, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Doug Perrine / Deepwater sea fan {Iciligorgia schrammi} rare orange variety, Dominica, Caribbean

Constantinos Petrinos / Deepwater Sea fan {Iciligorgia schrammi} Grand Cayman, Bahamas

Claudio Contreras / Deepwater sea fan (Iciligorgia schrammi), Cozumel Island, Caribbean Sea, Mexico.

Claudio Contreras / Deepwater sea fan (Iciligorgia schrammi), Cozumel Island, Caribbean Sea, Mexico.

Alex Mustard / Red clingfish (Arcos c.f. rubiginosus) guards its eggs (which are at a late stage of development) on a Deepwater sea fan (Iciligorgia nodulifera) on a coral reef. East End, Grad Cayman, Cayman Islands...