Centrolabrus melanocercusCentrolabrus melanocercus, the black-tailed wrasse, is a species of marine ray-finned fish from the wrasse family Labridae which is found in the Mediterranean Sea and the Sea of Marmara.TaxonomyThis species was formally described in 1810 as Lutjanus melanocercus by Antoine Risso with the type locality given as Saint Hospice near Villefranche-sur-Mer on the Mediterranean coast of France. This species was regarded as a member of the genus Symphodus but meristic and behavioural data placed it closer to the rock cook than the sexually dimorphic paternal nesting fishes in Symphodus.BiologyThis species prefers areas with rocks or eelgrass at depths from. It can reach in total length, though most do not exceed.