Did you know that the Zebra fish has the talent for generating their own eyes if they get damaged? That is just one of the remarkable things that fish can do that other animals can't. Humans that are blind may benefit from that phenomena. There is current research going on to determining if the cells that are in the Zebra fish can be used to repair human retinas. If it does work then people that are blind would have a chance at sight again. I wonder if the research would eventually do away with glasses for everyone. Right now the only alternative is to go to some Boston Lasik doctor and have the procedure done.
Other sea life that can regenerate parts of their bodies are starfish and octopus. If they lose a limb they can grow back a new one.