The Goby Rock is a small fish that can be found around the south and west coasts of England where it hides under stones and seaweed. It can also be found in rock pools when the tide is out. It is often mistaken for the Common Blenny which is also found in rock pools, even though the Common Blenny has a scaleless slimy body and the Goby Rock has a body covered with scales.

The Goby Rock is about twelve centimetres in length and is black with lots of white blotches over its body making it look almost grey in water. It also has pale grey-white edges on its side fins. It has quite a large rounded head and large eyes that are set quite high up on its head and it also turns black in March to June, just like the Common Blenny.

The female Goby Rock lays her eggs on the underside of boulders, rocks and shells from March to June and then leaves them. The male looks after the eggs by guarding and protecting them until they hatch. Young Goby Rock in their first year can often be found in rock pools in winter when all the other older fish have left.