Coin Fish

If you were looking for the level of the same name, see here.

The Red Coin Fish is a fish made out of coins (as the name implies.) Mario has to collect the fish's coins during the events of Super Mario Sunshine. The Red Coin Fish only appears in one level of the world, Noki Bay. It has eight Red Coins in it. Even though the fish is made out of coins (which are inanimate objects), it still seems to be alive.