A bluestreak cleaner wrasse searching the mouth of a clown sweetlips for parasites, Yap, Micronesia, Pacific

Potato cod (Epinephelus tukula) being cleaned by cleaner wrasse (Labroides dimidiatus), Cod Hole, Great Barrier Reef, Queensland, Australia, Pacific

Batfish cleaned by Cleaner Wrasse, Platax teira, Labroides dimidiatus, Indian Ocean, Maldives

Batfish cleaned by Cleaner Wrasse, Platax teira, Labroides dimidiatus, Indian Ocean, Maldives

Elongate Surgeonfish cleaned by Cleaner Wrasse, Acanthurus mata, Great Barrier Reef, Australia

Giant Moray, Gymnothorax javanicus, Great Barrier Reef, Australia

Six-banded Angelfish cleaned by Cleaner Wrasse, Pomacanthus sexstriatus, Komodo National Park, Indonesia

Six-banded Angelfish cleaned by Cleaner Wrasse, Pomacanthus sexstriatus, Komodo National Park, Indonesia

Flowery Grouper beeing cleaned, Epinephelus fuscoguttatus, Red Sea, Ras Mohammed, Egypt

Flowery Grouper beeing cleaned, Epinephelus fuscoguttatus, Red Sea, Ras Mohammed, Egypt

Giant Moray, Gymnothorax javanicus, Red Sea, Dahab, Egypt

Harlequin Sweetlips cleaned by Cleaner Wrasse, Plectorhinchus chaetodonoides, Komodo National Park, Indonesia

Blackspotted Puffer and Cleaner Wrasse, Arothron nigropunctatus, South Male Atoll, Maldives

Oriental Sweetlips cleaned by Cleaner Wrasse, Plectorhinchus vittatus, Labroides dimidiatus, South Male Atoll, Maldives

Cleanerwrasse cleans Soldierfish, Labroides dimidiatus, Raja Ampat, West Papua, Indonesia

Cleanerwrasse cleans Batfish, Labroides dimidiatus, Raja Ampat, West Papua, Indonesia

A longspine grouper (Epinephelus longispinis) being cleaned by a cleaner wrasse (Labroides dimidiatus).

An adult bluestreak cleaner wrasse (Labroides dimidiatus) at a cleaning station on the reef off Kri Island, Raja Ampat, Indonesia, Southeast Asia

Dotted sweetlips (Plectorhinchus picus), being cleaned by bluestreak cleaner wrasse (Labroides dimidiatus), Namu atoll, Marshall Islands, Pacific

Doublebar goatfish (Parupeneus bifasciatus) white phase, and cleaner wrasse (Labroides dimidiatus), Kailua-Kona, Hawaii, United States of America, Pacific

Symbiotic behaviour Symbiosis of jewel perch vermillion seabass (Cephalopholis miniata) lies at cleaning stationwith mouth wide open showing teeth rows of teeth motionless in coral reef lets cleaner wrasse bluestreak cleaner wrasse (Labroides dimidiatus) rid itself of parasites, Indian Ocean, Mascarene Islands, Mauritius, Africa

Star puffer (Arothron stellatus) and cleaner wrasse (Labroides dimidiatus), open mouth, Indo-Pacific Ocean

Sweetlips (Gaterin orentalis) opens mouth for Bluestreak cleaner wrasse (Labroides dimidiatus), Indian Ocean, Maldives, Asia

Symbiotic behaviour Symbiosis of giant moray (Gymnothorax javanicus) with open mouth looks directly at observer lets cleaner wrasse bluestreak cleaner wrasse (Labroides dimidiatus) rid itself of parasites, Indian Ocean, Mascarene Islands, Mauritius, Africa

Bumphead parrotfish (Bolbometopon muricatum) are the largest species in this family and can reach 5 feet in length and over 160 pounds, Yap, Micronesia

The endemic Hawaiian Cleaner Wrasse (Labroides phthirophagus) is taking a close look for parasites on this Crocodile Needlefish (Tylosurus crocodilus), Hawaii, United States of America

Indonesia, clown triggerfish (balistoides conspicillum) and cleaner wrasse.

Blackspotted sweetlip (Plectorhinchus gaterinus) with cleaner wrasse (Labroides dimidiatus), Sudan, Red Sea, Africa