Franco Banfi / Shoal of Greybar grunt (Haemulon sexfasciatum), under the stern of the Salvatierra wreck, Sea of Cortez, Baja California, Mexico, East Pacific Ocean

Claudio Contreras / Graybar grunt (Haemulon sexfasciatum) with Barberfish (Johnrandallia nigrirostris) for cleanup, Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Mexican goatfish (Mulloidichthys dentatus) with Barberfish (Johnrandallia nigrirostris) which act as cleaner fish, Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Graybar grunt (Haemulon sexfasciatum) asking Barberfish (Johnrandallia nigrirostris) which act as cleaner fish, Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Graybar grunt (Haemulon sexfasciatum), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Leopard grouper (Mycteroperca rosacea), IUCN Vulnerable, yellow morph, and Graybar grunt (Haemulon sexfasciatum), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July