Will the real clown of the sea please stand out?

When it comes to clowning around there is a before Nemo and an after Nemo. After Nemo, thanks in part to the world of Disney, it seems that Amphiprioninae have worn the mantle of Clownfish. The question remains who were the real clownfish before Nemo?

If it looks like a clown and crawls like a clown then it probably is a clown. So would the real Clownfish of the sea please stand out:

Soft-bodied, marine gastropod molluscs doesn't sound so amusing. Nudibranch on the other hand will hit the ulnar nerve of even the most obtuse of us.