I just had to try to contribute to the Exquisite Beast project.

I think the creature needed to get a bit more predatorial this time, being that he’s taken to the sea. It’s evolved for quick bursts of speed thanks to its compressed air sacs. The spines on the sacs are now covering them to increase the speed wen swimming. 

The bladders have retreated to prevent drag, and the enormous mouth has split up in four pieces resembling small tentacles. When closed they would look like a squid.

Both pairs of fins are now merged with the sacs support rims and move in a waving motion. The pair in the back remains in order to improve its handling.