Angler Fish is the mini-boss of Jabu-Jabu's Belly, the seventh dungeon in The Legend of Zelda: Oracle of Ages. The battle is waged in a side-scrolling room. Though Angler Fish is a fish, the battle takes place out of water, where Angler Fish flops around and shoots bubbles, attempting to damage Link. It's weak spot is the antenna on its head.
As Angler Fish attempts to spit bubbles at Link or ram into him, Link must dodge its attacks, and fire back with Scent Seeds from the Seed Shooter. If successfully hit with a seed, Angler Fish deflates and falls to the floor, leaving its lighted antenna briefly vulnerable to sword strikes. Don't worry though as if you run out of Scent Seeds, you can always get more by destroying the bubbles he shoots at you. You can also hurt Angler Fish when he's inflated, it's just much harder.