Sharks don’t need arms. They really don’t.
I’d say that at least this thing doesn’t fly, but here’s the thing: it certainly could. That’s what the Mutate mechanic is all about. You can basically Frankenstein creatures together, making one super creature with the combined abilities and keywords and stuff. So maybe you have a flying squirrel like this one. Well, all of a sudden, maybe that squirrel mutates, and bam! You now have a Nightmare Squirrel Shark Beast that flies.