Richard Robinson / Threespot wrasse (Halichoeres trimaculatus) female at Namuka-i-Lau Island lagoon, Lau Island Group, Fiji.

Richard Robinson / Halichoeres trimaculatus (Threespot Wrasse) female, Namuka-i-Lau Island lagoon, Lau Island Group, Fiji.

Pascal Kobeh / Masked porcupinefish (Diodon liturosus) and a Threespot dascyllus / damselfish (Dascyllus trimaculatus), Daymaniyat islands, Oman. Gulf of Oman.

Willem Kolvoort / Threespot Leporinus / Aracu (Leporinus friderici). Gran Rio, Suriname, September.

Georgette Douwma / Threespot squirrelfish (Sargocentron cornutum)Andaman Sea, Thailand

Georgette Douwma / Threespot squirrelfish (Sargocentron cornutum) pair under overhang with soft corals, Andaman Sea, Thailand

Georgette Douwma / Threespot squirrelfish (Sargocentron cornutum) pair under overhang with soft corals, Andaman Sea, Thailand

Alex Mustard / Threespot damselfish (Stegastes planifrons) defending its garden of algae, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Pete Oxford / Three spot damselfish, juvenile (Stegastes / Pomacentrus planifrons) on Great Star coral (Montastraea cavernosa) Bonaire, Netherlands Antilles, Caribbean

David Shale / Eelpout {Lycodes rossi} 2418m, benthic, Barents sea, Northern Europe

Fred Bavendam / Threespot Damselfish (Eupomacentrus planifrons) living amidst Staghorn Coral (Acropora cervicornis) fish kills Coral polyps and feeds on algae, Venezuela

Fred Bavendam / Threespot Damselfish (Eupomacentrus planifrons) living amidst Staghorn Coral (Acropora cervicornis) fish kills Coral polyps and feeds on algae, Venezuela