Fischer

Fischers are robotic hunter mobs that resemble fish. The player has to be level 33 hunter in order to damage it.

Spawning
Fischers spawn in the underground lake of Vox Ponds. They will only spawn below y = 30. They will despawn if the player gets too far from them, or if the difficulty is set to Peaceful.

Fischers can be spawned using /summon nevermine.Fischer.

Behavior
Fischers will pursue players that get within 16 blocks of one. They are swimming enemies who spawn and swim in water. They will always stay on the surface of the water, even if their target is below them. If on land, they are unable to move.

Trivia

 * Fischers are the only hunter mob not from the Overworld that spawn naturally.