Giant goby Giant goby The giant goby ("Gobius cobitis") is a species of goby native to coastal marine and brackish waters of the eastern Atlantic, the Mediterranean Sea and the Black Sea at depths of from . This species is of minor importance to commercial fisheries and is also popular as a game fish. The giant goby, which grows to in length, is greyish to olive brown with 'pepper and salt' markings. These are especially notable in smaller specimens. in the breeding season the male is darker than the female. The body is covered in small scales, and the tail stalk is
Sand goby rounded. In males, there is a conspicuous dark spot on the anterior dorsal fin and in both sexes there is a black patch on the caudal peduncle. The general colour is sandy brown with indistinct dark blotches and reticulations on the dorsal surface and dark striations on the pale fins. The colour of the male darkens during the breeding season and his fins become more coloured. The average size is about . The sand goby normally lives at greater depths than the common goby. It feeds on small invertebrates living on the seabed especially amphipods. It is well camouflaged and