Peacock Wrasse

The Peacock Wrasse is a common inhabitant of rocky reefs and Posidonia seagrass meadows across the Mediterranean Sea and adjacent eastern Atlantic coasts. It is best known for the striking breeding coloration of dominant males, which develop a vivid mix of green, blue, and orange across the body and head, resembling the display of a peacock's tail. Females and non-territorial males remain comparatively drab, with brownish-olive bodies and a dark horizontal stripe. Like most wrasses, the Peacock Wrasse has a thick-lipped mouth adapted for picking small invertebrates from rock and weed surfaces. It is a popular subject for divers and snorkelers in shallow Mediterranean waters and plays a notable role in local nest-building and mate-guarding behavior.

• Males (breeding): bright green-blue body overlaid with orange-red blotches, blue lines radiating from the eye
• Females/juveniles: olive-brown with a dark lateral stripe and pale belly
• Body: elongate, moderately compressed, thick lips, pointed snout
• Fins: single long dorsal fin, rounded tail

The Peacock Wrasse can be confused with the Cuckoo Wrasse (Labrus mixtus), but the Cuckoo Wrasse has a more slender body and black-blotched dorsal fin, while male Peacock Wrasse lack the black saddle and show a denser mix of orange spotting across the flanks. Females of both species are harder to separate and are often best identified by overall body shape and the presence or absence of a lateral stripe.

Peacock Wrasses are found throughout the Mediterranean Sea and along the eastern Atlantic coast from Portugal and the Bay of Biscay south to Morocco, typically in shallow water from the surface to about 20 meters. They favor rocky reefs, boulder fields, and Posidonia oceanica seagrass meadows, where crevices and vegetation offer both shelter and foraging grounds. Juveniles often settle in shallower, more sheltered seagrass patches before moving to deeper rocky terrain as adults. The species tolerates a range of temperate coastal conditions but avoids open sandy expanses lacking structure, since it relies on rock crevices for nesting and nighttime refuge.

Peacock Wrasses feed during the day on small invertebrates such as crustaceans, mollusks, and worms picked from rock surfaces and seagrass blades. Dominant males build and defend nests of algae and shell fragments in rock crevices, guarding eggs deposited by one or more females that visit the nest, a behavior unusual among wrasses. Like many labrids, the species is a protogynous hermaphrodite, with some individuals transitioning from female to male over their lifespan, contributing to a complex mating system that includes both nesting males and smaller 'sneaker' males that attempt to fertilize eggs without holding territory. At night, they retreat into rock crevices.