Also known as Gudgeon, Reef Goby, Sand Goby.
Found over rock and sandy areas in both shallow waters and extremely deep waters.
They feed on zooplankton.
Length - 8cm
Depth - 1-380m
Widespread Eastern Atlantic, Mediterranean
Reef Gobies have the largest and smallest species usually with very distinctive colouring. Ref: https://www.fishbase.se/summary/Gobius-roulei.html