WrasseLabridae

Wrasses (family Labridae) are a diverse group of marine fish, typically with elongated, compressed bodies, often brightly coloured and patterned. Most species measure under 20 cm (7.9 in) in length, though the largest reaches 2.5 m (8.2 ft). They possess protracted mouths with separate, protruding teeth, and many species have thick lips. Their single dorsal fin, comprising 8-21 spines and 6-21 soft rays, stretches along most of their back. The common name 'wrasse' derives from a Cornish word meaning 'old woman' or 'hag'.

These diurnal fish inhabit shallow coral reefs, rocky areas, and seagrass beds, generally staying close to the substrate from the surface down to approximately 60 m (200 ft). They are carnivorous, feeding on diverse small invertebrates. At night, many species bury themselves in sand or seek shelter in crevices. Many wrasse species are sexually dimorphic, with some exhibiting protogynous hermaphroditism, changing sex from female to male. Several species, such as the Bluestreak Cleaner Wrasse, perform a vital role by maintaining fixed cleaning stations where they remove parasites from other reef fish.