- Kingdom: Animalia
- Phylum: Chordata
- Subphylum: Vertebrata
- Superclass: Gnathostomata
- Class: Actinopterygii
- Order: Perciformes
- Family: Gobiidae
- Scientific name: Gobiusculus flavescens
- Norwegian: tangkutling
The most characteristic feature is the two spots, one at the base of the tail fin, and one just below the seven-spined first dorsal fin. The color may vary from greenish brown to almost red. There is usually a row of light blue spots running along each side of the body. It can reach a length of 6 cm.
It lives in shallow waters, hiding among algae.
The two-spotted goby is registered in the eastern Atlantic Ocean, from the Faroes and Vesterålen (Norway) to Spain. There are also some records from the Mediterranean.