Fred Bavendam / Giant Damselfish (Microspathodon dorsalis) male guarding eggs laid on a rock ledge Galapagos Islands, Ecuador

Alex Mustard / Yellowtail damselfish (Microspathodon chrysurus) guards eggs laid on a sea rod coral. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Claudio Contreras / Giant damselfish (Microspathodon dorsalis), San Agustin Bay, Huatulco Bays National Park, southern Mexico, November

Claudio Contreras / Giant damselfish (Microspathodon dorsalis) juvenile, San Agustin Bay, Huatulco Bays National Park, southern Mexico, November

Alex Mustard / Colony of Elkhorn coral (Acropora palmata) growing on a coral reef and making a home for Yellowtailed damselfish (Microspathodon chrysurus). The growth in this photo represents 12 year's growth since...

Franco Banfi / Giant Damselfish (Microspathodon dorsalis), Los Islotes, Sea of Cortez, Baja California, Mexico, East Pacific Ocean

Claudio Contreras / Giant Damselfish (Microspathodon dorsalis), Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Oc...

Alex Mustard / Portrait of an intermediate stage Yellowtail damselfish (Microspathodon chrysurus), this species changes colour during its life to avoid intraspecies aggression. East End, Grand Cayman, Cayman Islands...

Pete Oxford / Yellowtail damselfish, juvenile (Microspathodon chrysurus) Bonaire, Netherlands Antilles, Caribbean

Fred Bavendam / Giant Damselfish (Microspathodon dorsalis) male guarding eggs laid on a rock ledge Galapagos Islands, Ecuador

Fred Bavendam / Giant Damselfish (Microspathodon dorsalis) male guarding eggs laid on a rock ledge Galapagos Islands, Ecuador

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) grazing on algae near Yellowtail Damselfish (Microspathodon chrysurus), Sullivan Bay, Santiago Island, Galapagos Islands, Ecuador

Pete Oxford / Yellowtail Damselfish (Microspathodon chrysurus), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Yellowtail Damselfish (Microspathodon chrysurus) juvenile, Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Male Giant damselfish in breeding colours. Galapagos {Microspathodon dorsalis}

Henley Spiers / Giant damselfish (Microspathodon dorsalis) male, protecting its nest during breeding season from attack by hungry Cortez rainbow wrasse (Thalassoma lucasanum) initial phase and one in terminal phase,...

Claudio Contreras / Giant damselfish (Microspathodon dorsalis) swimming through coral reef. Huatulco Bays National Park, Oaxaca state, Mexico, Pacific Ocean. November.

Claudio Contreras / Giant damselfish (Microspathodon dorsalis) close up. Huatulco Bays National Park, Oaxaca state, Mexico, Pacific Ocean. November.

Claudio Contreras / Giant damselfish (Microspathodon dorsalis) juvenile, Punta Gorda, south of El Tecolote, Gulf of California (Sea of Cortez), Mexico, September

Claudio Contreras / Giant damselfish (Microspathodon dorsalis) guarding egg mass, Coronado Island, Loreto Bay National Park, Gulf of California (Sea of Cortez), Mexico, August

Claudio Contreras / Giant damselfish (Microspathodon dorsalis) guarding egg mass, Coronado Island, Loreto Bay National Park, Gulf of California (Sea of Cortez), Mexico, August

Claudio Contreras / Yellowtail damselfish (Microspathodon chrysurus) juvenile, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May

Alex Mustard / Staghorn coral (Acropora cervicornis) spawning at night in late summer, with a sleeping Yellowtail damselfish (Microspathodon chrysurus) inside. East End, Grand Cayman, Cayman Islands, British West In...