Squiddy

Squiddies are recurring enemies in the Legend of Zelda series. These purple, squid-like enemies are found in watery areas. They occasionally surface, allowing Link to shoot them with his cannon, making Rupees appear, after which it promptly begins to sink into the ocean again. The longer Link can keep it up in the air, the more Rupees he will receive.

The Legend of Zelda: Spirit Tracks
Squiddies appear in the Ocean Realm.