- Kingdom: Animalia
- Phylum: Chordata
- Subphylum: Vertebrata
- Superclass: Gnathostomata
- Class: Actinopterygii
- Order: Gobiesociformes
- Norwegian: dobbeltsugere
Characteristics:
The clingfishes are small, less than 6 cm. Just behind the head a sucker has replaced the pelvic fins. The sucker is used to cling to smooth surfaces, like rocks or shells. The skin is smooth and scale-less. The head is flattened, the dorsal fin is small. Some species are able to adapt their coloration to the surroundings, for camouflage.
Taxonomy:
This order includes a single family, Gobiesocidae. In Norway the two-spotted clingfish is the only registered species.