sea slug feeding on hydroids

invertebrate nudibranch underwater caronella hydroids organism aquarium feeding fjordia lineata seafood norway animal flower fjord coral petal slug cold dark oslo reef fish food sea nudibranch fjord oslo fjord sea life arctic underwater sea fish reef animal water nature slug worm deep rhinophore cerata gills pink slug marine life cold sea dark water subarctic norwegian marine life macro scandinavian slugs life fjords cold water diving sea slug pink creature orange soft coral coral ocean diving marine tropical scuba life anemone aquatic macro dive fjordia lineata