- Kingdom: Animalia
- Phylum: Chordata
- Subphylum: Vertebrata
- Superclass: Gnathostomata
- Class: Actinopterygii
- Order: Perciformes
- Family: Gobiidae
- Scientific name: Pomatoschistus microps
- Norwegian: leirkutling
The appearance of the common goby is very similar to the painted goby. The common goby is smaller, never exceeding a length of 6 cm. It has no scales on the top of the head, throat and neck. A relatively large dark blotch just behind the breast fin is perhaps the most obvious difference. Furthermore, it has a dark spot on the first dorsal fin. The coloration is dominated by brown patterns on a grey base.
It is quite common inshore, from the intertidal zone and as deep as 50 meters. It thrives in brackish water near estuaries and in tidal pools.
It can be found in the eastern Atlantic Ocean, from Trøndelag (Norway) to Morocco and the north-west Mediterranean.