There are 290 species of sponges recorded in Ireland, although the true figure is thought to be close to 500; 134 species were recorded off Rathlin Island alone. [1] [2] [3] [4]
Sponges are animals of the phylum Porifera; sessile aquatic animals without true tissues. [5]
Doriprismatica sedna is a species of colorful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.