Goldsinny Wrasse

Overview

The Goldsinny Wrasse (Ctenolabrus rupestris) is a small, slender marine fish widely distributed across the eastern Atlantic Ocean, the Mediterranean, and the Black Sea. As the only member of its genus, it is a common sight in shallow coastal waters where it plays an important role as a mesopredator and cleaner fish.

Appearance

This species typically reaches lengths of 10–12 cm, though it can grow up to 18 cm. Its body is generally brown, greenish, or orange-red. It is most easily identified by two distinct black spots: one located on the front of the dorsal fin and another on the caudal peduncle just before the tail. The fish has a small, pointed head, large eyes, and a fleshy-lipped mouth containing two rows of small teeth.

Distribution & habitat

Goldsinny Wrasse are found from Norway south to Morocco, as well as throughout the Mediterranean and into the Black Sea. They prefer rocky or boulder-strewn environments that offer plenty of crevices for shelter. While they are most common at depths of 1–50 meters, they are frequently associated with macroalgae and seagrass beds, and younger individuals may occasionally be found in rock pools.

Biology & behavior

These fish are diurnal and generally live in small groups near the seabed. They exhibit seasonal movement, often shifting to deeper waters during autumn and winter before returning to their home territories in the spring. Males are known to be territorial, particularly during the summer spawning season. Due to their habit of removing parasites from other fish, they are sometimes utilized in aquaculture as a natural alternative to chemical treatments for salmon lice.

Feeding

As carnivores, their diet is varied and consists primarily of small crustaceans, molluscs, bryozoans, and gastropods.