Also known as Black Goby, Gudgeon, Reef Goby.
Found singly in brackish waters amongst rocks, tidepools and weedy areas close to the shore of coastal reefs.
They feed on green algae, crustaceans, insects and worms.
Length - 14cm
Depth - 10-35m
Widespread Eastern Atlantic, Black Sea, Mediterranean
Reef Gobies have the largest and smallest species usually with very distinctive colouring. Ref: https://www.fishbase.se/summary/4579