Goldsinny Wrasse

The Goldsinny Wrasse (Ctenolabrus rupestris) is a small, common wrasse of the family Labridae, distributed across the northeastern Atlantic from Norway to Morocco, including the British Isles and the Mediterranean. It inhabits shallow rocky reefs, kelp beds, and seagrass meadows, sheltering among crevices and vegetation. The species is notable for its role in some aquaculture systems, where it is used as a natural cleaner fish to remove parasitic sea lice from farmed salmon. Goldsinny Wrasse populations are widespread and generally considered stable, though localized harvesting for cleaner-fish use is monitored in some regions.

Recognize the Goldsinny Wrasse by:

• Slender, elongated body typically 10-14 cm long
• Reddish-brown to golden-brown coloration overall
• A prominent black spot on the upper base of the tail fin
• A smaller, fainter black spot near the front of the dorsal fin
• Small, upturned mouth with fine teeth
• Continuous single dorsal fin

The combination of the tail-base spot and dorsal-fin spot distinguishes it from the similarly colored Rock Cook, which lacks the dorsal spot, and from juvenile corkwing wrasse.

Goldsinny Wrasse occupies rocky reef and kelp habitats throughout the northeastern Atlantic, from Norwegian fjords south through the British Isles and into the Mediterranean and Black Sea, typically at depths of 1-100 m. It favors structurally complex bottoms with boulders, crevices, and algae for shelter, and tolerates a range of temperate water temperatures. Juveniles often occupy shallower, more sheltered nearshore zones such as seagrass beds, while adults may be found somewhat deeper. It is largely non-migratory, remaining associated with a home reef area for extended periods.

Goldsinny Wrasse is a bold, active forager that feeds during daylight hours on small crustaceans, mollusks, and other invertebrates picked from rock and weed surfaces, and it will also pick parasites from the skin of other fish. It is not a schooling species, generally remaining solitary or loosely associated within a home range on the reef, and retreats into crevices at night or when threatened. Like other wrasses, it is a sequential hermaphrodite, with sex change occurring in some individuals during their life cycle. Spawning occurs in warmer months, with males often defending small territories. Its ectoparasite-picking behavior gives it an ecological cleaning role among reef fish.