I just had this idea in my head. Not sure if it'll stay.

It's female. Has no hind legs, but a single fish tail. Lungs, no gils. She has antlers straight at the "main part" {for lack of a better word} and just comes out at the tines. Cannot run, but walks on land like some kind of 3-legged animal. Fights with antlers or rears up on it's tail {but won't do it often for lack of good balancing skills}.

I think it is too much like a Scythe adoptable, though.

{E} tried a little bit of cell shading, actually:)