Pete Oxford / Spotted Scorpionfish (Scorpaena plumieri) camouflaged in rocks near King Angelfish (Holacanthus passer), Tower Island, Galapagos Islands, Ecuador

Claudio Contreras / King angelfish (Holacanthus passer), Salsipuedes Island Protected Area, Gulf of California (Sea of Cortez), Mexico, July

Claudio Contreras / King angelfish (Holacanthus passer), San Pedro Martir Island Protected Area, Gulf of California (Sea of Cortez), Mexico, July

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) grazing on algae near King Angelfish (Holacanthus passer) school, Cape Douglas, Fernandina Island, Galapagos Islands, Ecuador

Fred Bavendam / King Angelfish (Holacanthus passer), Galapagos Islands, Ecuador

Fred Bavendam / Gulf Star (Oreaster occidentalis) pair and King Angelfish (Holacanthus passer) school, Galapagos Islands, Ecuador

Doug Perrine / King angelfish {Holacanthus passer} Galapagos

Pete Oxford / Shoal of King or White-banded angelfish (Holacanthus passer) Española / Hood Island, Galapagos

Pete Oxford / King Angelfish (Holacanthus passer) and Yellowtail Surgeonfish (Prionurus laticlavius) mixed school over reef, Gardner Bay, Espanola Island, Galapagos Islands, Ecuador

Tui De Roy / School of King angelfish (Holacanthus passer) and Dusky chub (Girella freminvillei) gathering together, with Green turtle (Chelonia mydas) in background. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Three Green turtles (Chelonia mydas) visiting cleaning station with King angelfish (Holacanthus passer). Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Green turtle (Chelonia mydas) visiting cleaning station with King angelfish (Holacanthus passer). Galapagos Islands, Ecuador Pacific Ocean.

Lucas Bustamante / Bumphead parrotfish (Bolbometopon muricatum) and King angelfish (Holacanthus passer) swimming over reef, Gordon Rocks, Galapagos National Park, Pacific Ocean.

Henley Spiers / Olive ridley turtle (Lepidochelys olivacea) resting on seabed surrounded by group of cleaner fish including Yellowtail surgeonfish (Prionurus punctatus), Mexican hogfish (Bodianus diplotaenia) and Ki...

Henley Spiers / Moorish idol (Zanclus cornutus), Mexican hogfish (Bodianus diplotaenia), and pair of King angelfish (Holacanthus passer) over a colourful reef, Baja California Sur, Mexico, Sea of Cortez, Pacific Ocea...

Alex Mustard / Galapagos Green turtle (Chelonia agassizii) feeding on algae growing on the seabed, accompanied by King angelfish / Passer angelfish (Holacanthus passer). Darwin Island, Galapagos National Park, Galap...