I remember playing a not too old mobile game called Super Starfish, where the characters are based on real life sea creatures.

A lot of them look really adorable, I want them as pets, especially Jooso (the yellow-orange koi fish), Bluberri (a blueberry colored tropical fish), and Mantee (a very colorful mantis shrimp). Garnette (one of the octopi) also looks kinda nice. And so does Don (based on the megalodon shark).