Gary Bell/ Oceanwide / Painted Sweetlips (Diagramma pictum) in Slender Cardinalfish (Rhabdamia gracilis) school, Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Painted Sweetlips (Diagramma pictum) in Slender Cardinalfish (Rhabdamia gracilis) school near Double-headed Maori Wrasse (Cheilinus undulatus), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Double-headed Maori Wrasse (Cheilinus undulatus), Painted Sweetlips (Diagramma pictum), and Slender Cardinalfish (Rhabdamia gracilis) school, Great Barrier Reef, Queensland, Australia

Claudio Contreras / French Angelfish (Pomacanthus paru) with a Smallmouth Grunt (Haemulon chrysargyreum) and Blade Fire Coral (Millepora complanata). Cancun National Park, Caribbean Sea, Mexico.

Alex Mustard / Bluestriped grunt (Haemulon sciurus) portrait, West End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Claudio Contreras / Shoal of Smallmouth grunts (Haemulon chrysargyreum) surrounding Blade firecoral (Millepora complanata) Cancun National Park, Caribbean Sea, Mexico, September

Pascal Kobeh / School of white margates or white grunts (Haemulon album) Yucatan peninsula, Mexico.

Pascal Kobeh / Close-up of a school of bluestriped or boar grunts (Haemulon sciurus) Yucatan peninsula, Mexico, Caribbean.

Shane Gross / Smallmouth grunt (Haemulon chrysargyreum) shoal schooling on coral reef. Nassau, Bahamas.

Franco Banfi / Shoal of Graybar Grunt (Haemulon sexfasciatum), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Eladio Fernandez / Coral reef with mixed shoal of fish including Porkfish (Anisotremus virginicus), Bluestriped grunt (Haemulon sciurus), Jardines de la Reina, Cuba

David Fleetham / Sccales and color pattern on the side of Bluestripe Grunt (Haemulon sciurus). Bonaire, the Netherlands Antilles, Caribbean.