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 / Colourful coral reef wall, with yellow branching tube sponges (Pseudoceratina crassa), brown tube sponges (Agelas conifera) and red rope sponges (Amphimedon compressa), in front of deepwater sea fans...

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 / Brown tube sponges (Agelas conifera) and deepwater sea fans (Iciligorgia nodulifera) with a diver in background exploring the reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbe...

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.

Alex Mustard / Coral reef outcrop with brown tube sponges (Agelas conifera) deepwater sea fans (Iciligorgia nodulifera) and knobby cactus coral (Mycetophyllia aliciae) East End, Grand Cayman, Cayman Islands, Britis...

Alex Mustard / Reef scene with Orange elephant ear sponge (Agelas clathrodes), Brown tube sponges (Agelas conifera), Deepwater sea fans (Iciligorgia nodulifera), Creole wrasses (Clepticus parrae) and Fairy basslets...

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...