Wandering Eye Fish

The Wandering Eye Fish is a pre-Hardmode enemy which can be spawned by fishing in a Blood Moon. When the bobber dips and a player clicks to reel in a fish, a Wandering Eye Fish or a Zombie Merman has a chance to spawn in place of a fish, within a few blocks to either side of the bobber. The Wandering Eye Fish is incredibly powerful, and it can out-speed any boots when running in a straight line. It will chase any player it can get to, and it will fly off if you hide from it via a block shelter. It can kill any player in a few hits regardless of any pre-Hardmode armor you are wearing.

It has a similar appearance to Demon Eyes and Wandering Eyes, it being named after the latter. Instead of severed nerves and blood vessels trailing from its rear, it sports red fins.

Tips

 * The Wandering Eye Fish has high health and defense, and it also doesn't take knockback, so weaker characters should beware.
 * One way to effectively fight the Wandering Eye Fish is to obtain a movement accessory such as a Cloud in a Bottle or Rocket Boots and make tight circles around the enemy. Its top speed may be too fast for underequipped players, but its turning radius is easily outclassed.