Echinus acutus
Systematics :
Kingdom: Animals (Animalia)
Phylum: Echinoderms (Echinodermata)
Class: Sea urchins (Echinoidea)
Order: Diadematoidea
Family: Echinidae
Genus: Echinus
Species: Echinus acutus
Norwegian name: Langpiggsjøpiggsvin
Confusion species: Echinus esculentus