Todd Mintz / Sharknose cleaner goby (Gobiosoma evelynae) pair sheltering in hard coral, Netherlands Island, Dutch Antillies, Caribbean

Alex Mustard / Cleaning goby (Elacatinus genie) hovering in mid-water. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Claudio Contreras / Redhead goby (Elacatinus punticulatus), Espiritu Santo National Park, Sea of Cortez (Gulf of California), Mexico, February

Claudio Contreras / Redhead Goby (Elacatinus punticulatus), Espiritu Santo National Park, Sea of Cortez (Gulf of California), Mexico, February

David Fleetham / Sharknose goby (Elacatinus evelynae / Gobiosoma evelynae) cleaning Blue striped grunt (Haemulon sciurus) Bonaire, the Netherlands Antilles, Caribbean.

David Fleetham / Cleaning Goby (Gobiosoma genie) on hard coral, Bonaire, the Netherlands Antilles, Caribbean.

Linda Pitkin / Sharknose goby (Elacatinus evelynae) on star coral Bonaire, Leeward Antilles, Caribbean.

Alex Mustard / Cleaner goby (Elacatinus genie) waiting for fish on a brain coral. North Wall, Grand Cayman, Cayman Islands. Caribbean Sea.

Alex Mustard / Nassau grouper (Epinephelus striatus) cleaned by Cleaner gobies (Gobiosoma genie) and juvenile Spanish hogfish (Bodianus rufus) on a coral reef. Bloody Bay Wall, Little Cayman, Cayman Islands. Caribbe...

Franco Banfi / Redhead goby (Elacatinus puncticulatus) Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Pete Oxford / Yellownose goby (Elacatinus randalli) in Grooved brain coral (Diploria labyrinthiformis) Bonaire, Netherlands Antilles, Caribbean

Joel Sartore / Photo Ark / Redhead goby (Elacatinus puncticulatus) portrait, Indianapolis Zoo. Captive, occurs in Eastern Pacific Ocean.

Joel Sartore / Photo Ark / Redhead goby (Elacatinus puncticulatus) portrait, Indianapolis Zoo. Captive, occurs in Eastern Pacific Ocean.

Claudio Contreras / Redhead goby (Elacatinus punticulatus), San Rafaelito Lighthouse Islet, Balandra National Protected Area, near La Paz, Gulf of California (Sea of Cortez), Mexico, September

Claudio Contreras / Redhead goby (Elacatinus punticulatus), Puerto Escondido, Loreto Bay National Park, Gulf of California (Sea of Cortez), Mexico, August

Claudio Contreras / Goby (Elacatinus sp.) on Lesser Starlet Coral (Siderastrea radians), Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May

Alex Mustard / Close up photo of a Cleaning goby (Elacatinus genie) on a coral reef. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Claudio Contreras / Goby (Elacatinus sp.) on sponge, Guanahacabibes Peninsula National Park, Pinar del Rio Province, western Cuba.

Claudio Contreras / Goby (Elacatinus sp.) on coral, Guanahacabibes Peninsula National Park, Pinar del Rio Province, western Cuba.

Claudio Contreras / Sharknose Goby (Elacatinus / Gobiosoma evelynae), Cienaga de Zapata National Park, Matanzas Province, Cuba.