Angler Fish

The Angler Fish is a Hardmode enemy which spawns in the Cavern layer and in the Jungle. It swims faster than Piranhas when chasing the player, and can inflict the Bleeding debuff. It has a small glowing bulb on its head that emits a small amount of light.

Trivia

 * In reality, the lives deep under the sea, and like their game counterpart, the females do have a glowing bulb they use to attract prey.