Juergen Freund / Yellowtail fusilier (Caesio cuning) being cleaned by a Bluestreak cleaner wrasse (Labroides dimidiatus) Papua New Guinea.

Georgette Douwma / Elongate surgeonfish (Acanthurus mata) at a cleaning station with Bluestreak cleaner wrasses and sweepers in the background. Andaman Sea, Thailand

Georgette Douwma / Red soldierfish (Myripristis murdjan) being cleaned by a Bluestreak cleaner wrasse (Labroides dimidiatus), Andaman Sea, Thailand

Georgette Douwma / Rivulated rabbitfish (Siganus rivulatus) being cleaned by a Bluestreak cleaner wrasse (Labroides dimidiatus) Andaman Sea, Thailand

Georgette Douwma / Giant moray eel (Gymnothorax javanicus) emerging from soft corals, being cleaned by Bluestreak cleaner wrasse, Andaman Sea, Thailand

Georgette Douwma / Soldierfish (Myripristis sp.) with Bluestreak cleaner wrasse (Labroides dimidiatus). Rinca, Komodo National Park, Indonesia.

Juergen Freund / Bluestreak cleaner wrasse (Labroides dimidiatus)cleaning a Scissortail fusilier (Caesio caerulaurea) New Ireland, Papua New Guinea.

Georgette Douwma / Bluestreak Cleaner Wrasses (Labroides dimidiatus) cleaning a snapper. Komodo National Park, Indonesia, October.

Georgette Douwma / Bluestreak Cleaner Wrasses (Labroides dimidiatus) cleaning a snapper. Komodo National Park, Indonesia, October.

Georgette Douwma / Ribbon / Giant sweetlips (Plectorhinchus albovittatus) with a Bluestreak cleaner wrasse (Lutjanus dimidiatus). Rinca, Komodo National Park, Indonesia

GEORGETTE DOUWMA / Six-banded angelfish (Pomacanthus sexstriatus) being cleaned by two Bluestreak cleaner wrasse(Labroides dimidiatus) Indonesia

Tim Laman / Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning a Spotted Porcupinefish (Diodon hystrix) on a coral reef in Bali, Indonesia.

GEORGETTE DOUWMA / Twinstripe fusilier (Pterocaesio marri) with a Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning inside its mouth. Misool, Raja Ampat, West Papua, Indonesia

GEORGETTE DOUWMA / Six-banded angelfish (Pomacanthus sexstriatus) being cleaned by two Bluestreak cleaner wrasses (Labroides dimidiatus) Indonesia.

GEORGETTE DOUWMA / Six-banded angelfish (Pomacanthus sexstriatus) being cleaned by two Bluestreak cleaner wrasses (Labroides dimidiatus). Indonesia

GEORGETTE DOUWMA / Six-banded angelfish (Pomacanthus sexstriatus) pair at cleaning station being cleaned by a Bluestreak cleaner wrasse (Labroides dimidiatus) Indonesia.

GEORGETTE DOUWMA / Six-banded angelfish (Pomacanthus sexstriatus) at a 'cleaning station' being cleaned by two Bluestreak cleaner wrasses (Labroides dimidiatus) with a second angelfish waiting its turn. Indonesia.

GEORGETTE DOUWMA / Six-banded angelfish (Pomacanthus sexstriatus) being cleaned by a Bluestreak cleaner wrasse (Labroides dimidiatus) Indonesia

GEORGETTE DOUWMA / Masked puffer (Arothron diadematus) with Bluestreak cleaner wrasse (Lutjanus dimidiatus). Egypt, Red Sea.

GEORGETTE DOUWMA / Masked puffer (Arothron diadematus) with Bluestreak cleaner wrasse (Lutjanus dimidiatus). Egypt, Red Sea.

Fred Bavendam / Elongate Surgeonfish (Acanthurus mata) being cleaned by Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Bali, Indonesia

Fred Bavendam / Tomato Grouper (Cephalopholis sonnerati) getting cleaned by Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Bali, Indonesia

GEORGETTE DOUWMA / Slingjaw wrasse (Epibulus insidiator) being cleaned by two Bluestreak cleaner wrasse (Labroides dimidiatus). Andaman Sea, Thailand

GEORGETTE DOUWMA / Two Elongate surgeonfish (Acanthurus mata) with Bluestreak cleaner wrasses, showing the colour changes the fish can go through during cleaning. Sweepers in background. Andaman Sea, Thailand.

GEORGETTE DOUWMA / Oriental sweetlips (Plectorhinchus vittatus) with a Bluestreak cleaner wrasse (Labroides dimidiatus). Andaman Sea, Thailand

GEORGETTE DOUWMA / Elongate surgeonfish (Acanthurus mata) at cleaning station with a Bluestreak cleaner wrasse (Labroides dimidiatus). Andaman Sea, Thailand

GEORGETTE DOUWMA / Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning a diver's ear. Andaman Sea, Thailand

GEORGETTE DOUWMA / Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning diver's ear. Andaman Sea, Thailand

Norbert Wu / Blue-streaked Cleaner Wrasse (Labroides dimidiatus) cleaning Guineafowl Pufferfish (Arothron meleagris), Raja Ampat Islands, Indonesia

Fred Bavendam / Unicornfish (Naso vlamingii) being cleaned by a Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Bali, Indonesia

Chris Newbert / Blue-streaked Cleaner Wrasse (Labroides dimidiatus) cleaning gills of Map Puffer (Arothron mappa) 80 feet deep, Solomon Islands

Fred Bavendam / Eyepatch Butterflyfish (Chaetodon adiergastos) lining up for the services of a Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Bali, Indonesia

Fred Bavendam / Blue-streaked Cleaner Wrasse (Labroides dimidiatus) working on a Giant Moray Eel (Gymnothorax javanicus), Red Sea, Egypt

Jeff Rotman / Lunar tailed grouper {Variola louti} + symbiotic Bluestreak cleaner fish {Labroides dimidiatus} Red Sea