native fish-based tails?

[Anahita]

I had a thought the other night, has anyone ever done a tail based on a non-fish, like a cuttlefish? i could so see "(just a little bit) Closer" being its theme song. and i would be interested.

Seavanna just got her tail from Finfolk based on a Man o' War. Not quite a cuttlefish, but tentacled nonetheless.