Alex Mustard / Herbivorous blue tang (Acanthurus coeruleus) swimming through the rigid branches of a pillar coral (Dendrogyra cylindrus) 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 / 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...