Moontail bullseye fish
Moontail bullseye fish (Priacanthus hamrur) being cleaned by a bluestreak cleaner wrasse (Labroides dimidiatus, centre). Such cleaning is symbiotic (mutually beneficial) behaviour. The wrasse feeds on parasites from the skin of the moontail. Cleaner fish attract larger fish to cleaning stations by making oscillatory movements. The large fish respect this service and refrain from eating the cleaners. Photographed in the Red Sea.
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