This is one of my oc Akwa. He is a puffer fox (Puffer fish + Fox). He could inflate himself with lots of air or just drink water till he's big.
He is a lifeguard but for fishes. He would help fishes that was washed up on the beach by swallowed them in to his tum then swim into the deep part of the sea to release them, though sometimes he got too big to even release them out.