Also known as: 海のウサギ, ゴマフビロードウミウシ, Jorunna
Any kind of Sea Slug that vaguely looks like a Rabbit.
There is a species of sea slug, the Jorunna parva, which has the nickname of sea bunny in several languages. The official Japanese name for it however is sesame velvet sea slug, due to its small spots and soft appearance. As a result, it is sometimes given the nickname goma-chan (sesame-chan).