Nudibranch

Photo: sunhill · CC BY-NC

The Jørpeland wall hosts an exceptional diversity of nudibranchs, with Flabellina pedata among the most striking — its purple-tipped cerata glowing against white anemone colonies. Cold Norwegian waters support much higher nudibranch diversity than warmer Atlantic sites, with species hunting hydroids across the wall's entire depth range. Spring through early summer is peak season when hydroids bloom and nudibranch spawning aggregations form on exposed rock faces.