Janthina n. : See Ianthina.

Example:


Taxonomy
genus, raft, sea snails, free encyclopedia, clade, family, Species names, Adult, violet color, 24 December, pelagic, light purple, search, bubble, beach, Kingdom, Phylum, unranked.

Defination from the web:
Janthina. Röding, 1798. Species. See text. Janthina is a genus of small to medium-sized pelagic or planktonic sea ... Adult snails may not be capable of swimming, and die when they are detached from their rafts; Janthina janthina larvae, however, actively swim in the water column.[1] ...