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Desktop/Mobile-Only Content: This information applies only to the Desktop and Mobile versions of Terraria.

The Zombie Merman is a pre-Hardmode enemy that can be spawned by fishing in a Blood Moon. When the bobber dips and the player attempts to reel in a fish, a Zombie Merman or a Wandering Eye Fish has a chance to spawn within a few tiles of the bobber in place of a fish.

It is one of the few entities that can be detected by the Lifeform AnalyzerDesktop, Console, and Mobile versions or its upgrades.


  • The Zombie Merman, like other zombies during a Blood Moon, can break open doors.
  • The Sonar Potion will detect if a Blood Moon enemy is about to be hooked.
  • Using the Chum Caster will greatly increase the chances of hooking Blood Moon enemies.


  • The Zombie Merman has high health and defense, moves very quickly, and does not take knockback, making it a challenging enemy for underpowered characters.
  • It is very agile while in water, making it hard to deal with. Players can build a layer of platforms above their fishing spot to prevent the Zombie Merman from entering the water in the first place.
  • The Zombie Merman is a great way of progressing in the early game as it can drop useful items.


  • The Zombie Merman Banner is the last item in alphabetical order out of all the items in Terraria.
  • It resembles both the Icy Merman and the Merfolk form that the player can achieve by equipping the Neptune's Shell (or its derivative accessories) in water.
  • The BestiaryBestiary entry for the Zombie Merman: "Mermen may be rare and exotic demi-humans, but they can still die... and still come back from that a changed merman."


  • Desktop 1.4.1:
    • Drop chances for Vampire Frog Staff, Blood Rain Bow, and Chum Caster increased from 4.17*1/24 (4.17%) to 12.5*1/8 (12.5%), and are no longer mutually exclusive.
    • Drop chance of Bloody Tear increased from 0.5*1/200 (0.5%) to 4*1/25 (4%).