Moray Eel

The Moray Eel is a Pre-Hardmode enemy that spawns in the Ocean and the 1st layer of the Abyss. It swims around when not aggressive, but as soon as the player gets too near or hits it, it will swim in their direction and attempt to attack them. If hit, it will not go passive again, even if the player is far from it.

Trivia

 * Despite being an enemy that spawns in the Abyss, it is unable to drop the Halibut Cannon.