Grey Wrasse

Overview

The Grey Wrasse (Symphodus cinereus) is a small, coastal fish native to the Mediterranean and Black Seas, as well as the eastern Atlantic from the Bay of Arcachon to Gibraltar. It is a common inhabitant of shallow, sheltered waters, frequently found in seagrass beds and areas with sandy or rocky bottoms.

Distribution & habitat

This species typically resides in littoral zones at depths between 1 and 20 meters. It shows a preference for calm environments, including lagoons, estuaries, and the edges of Posidonia seagrass meadows, where it thrives among abundant vegetation and detritus.

Appearance

Generally measuring 8 to 16 cm, the Grey Wrasse has an oval, laterally compressed body with a small, non-protractile mouth. Its coloration is highly variable based on sex, season, and location, typically ranging from ash-grey or beige to greenish or reddish hues. A key identifying feature is a distinct black spot at the base of the caudal peduncle. During the breeding season, males develop more vibrant colors, including yellow-orange throats and bellies, blue-streaked cheeks, and body marbling.

Biology & behavior

Grey Wrasses are diurnal and often live in small groups. They are territorial and can be aggressive toward conspecifics or other fish that enter their space. The species is a protogynous hermaphrodite, meaning individuals are born female and some may transition into males as they mature. Males grow faster than females and play a central role in reproduction by building and guarding nests.

Feeding

This omnivorous fish feeds primarily on small invertebrates found in the substrate, including shrimps, amphipods, isopods, small gastropods, bivalves, polychaetes, and bryozoans.