Alex Mustard / School of Silversides (Atherinidae) are harassed by a pair of predatory Bar jacks (Caranx ruber) on the deck of wreck of the USS Kittiwake. Seven Mile Beach, Grand Cayman, Cayman Islands, British West...

Alex Mustard / Bar jacks (Caranx ruber) pair hunting Silversides (Atherinidae) inside the wreck of the Kittiwake. Seven Mile Beach, Grand Cayman, Cayman Islands, Caribbean Sea

Alex Mustard / Sergeant major (Abudefduf saxatilis) male cleans his nest, with purple eggs visible behind, wreck of the Kittiwake. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Stern of the USS Kittiwake wreck. Seven Mile Beach, Grand Cayman, Cayman Islands, Caribbean Sea.

Alex Mustard / Creole wrasse (Clepticus parrae) shoal above the bow of the wreck of the USS Kittiwake. Seven Mile Beach, Grand Cayman, Cayman Islands.

Alex Mustard / Creole wrasse (Clepticus parrae) shoal above the bow of the wreck of the USS Kittiwake. Seven Mile Beach, Grand Cayman, Cayman Islands.

Alex Mustard / Bow of the USS Kittiwake wreck. Seven Mile Beach, Grand Cayman, Cayman Islands, Caribbean Sea.

Will Burrard-Lucas / Seven Mile Beach at sunset, Grand Cayman Island, Cayman Islands, May 2012.

Alex Mustard / Skin of a nurse shark (Ginglymostom cirratum) showing the rough placoid scales, commonly called denticles. These scales have the same structure as the shark's teeth and are as rough as sandpaper when...

Alex Mustard / Tiny Arrow Blenny (Lucayablennius zingaro) tail cocked ready to send its streamlined body shooting forward to catch its prey. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies. Carib...

Alex Mustard / A large Rainbow Parrotfish (Scarus guacamaia) sleeps at night inside the wreck of the Oro Verde. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies.

Alex Mustard / Green / common iguana (Iguana iguana) climbing a tree, Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies.