- Kingdom: Animalia
- Phylum: Chordata
- Subphylum: Vertebrata
- Superclass: Gnathostomata
- Class: Actinopterygii
- Order: Scorpaeniformes
- Family: Cottidae
- Scientific name: Taurulus bubalis
- Norwegian: dvergulke
It can be distinguished from the larger bull rout, by the long spine in front of the gill cover. There are four spines on the gill cover, all together. It has a clearly visible barbell at the corner of the mouth. The sea scorpion is quite small, never exceeding a length of 17 cm. The lateral line is spiny. The color varies with the surroundings. It can be red with pink spots when living on rock covered in pink algae and greenish-brown amongst brown seaweed.
It is most frequent on rocky substrate between the subtidal zone and a depth of 30 meters.
The sea scorpion can be found along the Atlantic coasts from Murmansk to Portugal and on Iceland and the Shetlands.