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Blood EelHardmode exclusive
Blood Eel.png
Classic mode icon.png Classic
Expert mode icon.png Expert
Master mode icon.png Master
AI TypeWorm AI
Max Life6000/12000/18000
KB Resist100%
BannerBlood Eel BannerBlood Eel Banner
Immune toConfused

The Blood Eel is a flying Hardmode enemy that can be spawned by fishing during a Blood Moon event. When the bobber dips and the player attempts to reel in a fish, a Blood Eel or another enemy has a chance to spawn within a few blocks of the bobber in place of a fish. Its behavior is rather similar to that of the Wyvern, though it moves considerably faster.

It is one of the few entities that can be detected by the Lifeform Analyzer or its upgrades.


Classic mode icon.png Classic
Expert mode icon.png Expert
Master mode icon.png Master
2 values: Pre-Hardmode › Hardmode
3 values: Pre-Hardmode › Hardmode › Post-Plantera
NPC ID Segment Damage Defense
621 Blood Eel Head.png Blood Eel Head 90/180/270 0
622 Blood Eel Body.png Blood Eel Body 60/120/180 30
623 Blood Eel Tail.png Blood Eel Tail 50/100/150 40


  • 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.


  • As with any multi-segmented enemy, piercing and explosive weapons can strike multiple segments at once, dealing several times their normal damage.
  • The head of the Blood Eel has lower defense than its tail or body segments, making it more vulnerable to damage as it charges the player. However, the head also deals twice the damage as the rest of the body on contact, making it risky to face the Blood Eel head on.
  • The Blood Eel can be easily dodged using the Shield of Cthulhu. As the Eel comes in to attack, perform a dash away from or under the Eel to avoid being hit.
  • Flying in a straight line away from it with the Pirate Ship Mount can make this fight considerably easier as the mount's top speed is just higher than the Eel's.


  • The BestiaryBestiary entry for the Blood Eel: "A large, worm-like demon, dripping with blood - both its own, and its victim's. It's a bloody nightmare of a fiend!"