• Kingdom: Animalia
  • Phylum: Arthropoda
  • Subphylum: Crustacea
  • Class: Malacostraca
  • Subclass: Eumalacostraca
  • Superorder: Eucarida
  • Order: Decapoda
  • Suborder: Pleocyemata
  • Infraorder: Anomura
  • Norwegian: anomurer


Some anomurans are occasionally mistaken for crabs, others look like crayfish. The abdomen possessing a visible tail fan is typical for this infraorder. The squat lobsters use it to swim backwards, the hermit crabs to hold the body inside a shell, while others use it for burrowing.


Three superfamilies of anomurans are registered in the Norwegian marine fauna: