Hydrozoer: Clavactinia serrata.

Clavactinia serrata is a little-known species restricted to Arctic waters, where its colonies grow on marine snails of the genus Buccinum. The combination of their preferred substrate, serrated spines, and gonophores developing at the base of the gonozooids render this species distinguishable from other Arctic hydractiniids.

Clavactinia serrata Kramp, 1943
Creative Commons Attribution | Lara Beckmann | Joan J. Soto-Àngel | Aino Hosia | Luis Martell | Universitetsmuseet i Bergen, Universitetet i Bergen
Kart. Utbredelse i Norge.