Green Wrasse

Overview

The green wrasse (Labrus viridis) is a distinctive marine fish native to the eastern Atlantic Ocean, ranging from Portugal to Morocco, as well as the Mediterranean and Black Seas. It is a reef-associated species typically found in shallow coastal waters, where it relies on complex environments for shelter and hunting.

Distribution & habitat

This species primarily inhabits rocky coastal zones and seagrass meadows, such as Posidonia beds. It is most commonly encountered at depths between 2 and 50 meters, where it finds protection among rocks and dense vegetation.

Appearance

The green wrasse has an elongated, plump body with a moderately large head, thick lips, and a small mouth equipped with large teeth. While its name suggests a uniform green color, its appearance can vary; many individuals display a bright green hue with a characteristic blue line along the flank, while others may show brownish or reddish tones. The skin is covered in large, smooth, mucus-coated scales, and the fish often features small white spots, particularly in older specimens.

Biology & behavior

Green wrasses are diurnal, solitary fish that maintain territories and can be aggressive toward intruders of similar species. They are known for their agility when navigating rocky bottoms. As a protogynous hermaphrodite, the species undergoes a sex change, transitioning from female to male as it ages.

Feeding

As an opportunistic carnivore, the green wrasse actively hunts small benthic invertebrates. Its diet consists primarily of crustaceans, mollusks, bristle worms, and occasionally small fish, which it captures using its specialized mouth and quick movements.

Reproduction

During the breeding season, males exhibit complex mating behaviors, including the construction of dish-shaped nests. The male guards these nests and protects the eggs until they hatch, a role that makes the species particularly vulnerable to the removal of breeding individuals from the population.