- Kingdom: Animalia
- Phylum: Chordata
- Subphylum: Vertebrata
- Superclass: Gnathostomata
- Class: Actinopterygii
- Order: Perciformes
- Family: Pholidae
- Scientific name: Pholis gunnellus
- Norwegian: tangsprell
Characteristics:
A unique feature of the butterfish is the 9-15 dark brown spots framed by white circles, just beneath the dorsal fin. The slender, eel-like body may reach a length of 25 cm. The color is light brown. The butterfish is the only member of the Pholidae family in Norwegian waters.
Habitat:
It is usually seen among algae in the subtidal zone (rarely deeper than 30 meters)
Distribution:
It can be found on both sides of the North Atlantic Ocean. In the east it is distributed from the Kanin Peninsula to France.