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

An adult bluestreak goby (Valenciennea strigata), on the reef off Kri Island, Raja Ampat, Indonesia, Southeast Asia

An adult bluestreak goby (Valenciennea strigata), on the reef off Kri Island, Raja Ampat, Indonesia, Southeast Asia

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

Bluestreak fusiliers (Pterocaesio tile) schooling, Namu atoll, Marshall Islands, Pacific

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

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

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

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

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

Bluestreak goby, Valenciennea strigata, Papua New Guinea, Pacific ocean