nudibranch from oslo fjord

invertebrate nudibranch underwater caronella pellucida pellucid organism aquarium wildlife seafood seabed norway animal fjord muddy coral oslo cold dark reef fish food rom red nudibranch fjord oslo fjord sea life arctic parasitic nudibranch flabellina pellucida rhinophore cerata gills pink slug marine life cold sea dark water subarctic norwegian marine life macro scandinavian sea slugs life fjords cold water diving flabellina parasite symbiosis pellucida pedata splachnotrophus opisthobranch stinging cells caronella