Phylum: Arthropoda

Class: Crustacea

Subclass: Cirripedia

Order: Thoracica

Family: Balanidae

Scientific name: Balanus balanus

 

Norwegian: steinrur

(Stokkøya - Sør-Trøndelag / 6 meters / 6.02.2001)

Distribution: Balanus balanus is distributed over the entire northern hemisphere. Adults live attached. to rocks, stones, shells or any other hard surface on depths between 2 and several hundred meters.

Characteristics: The diameter is usually 2-3 cm but individuals with a diameter of 5 cm as been observed. The cover plates look like a birds beak.

All pictures: