Piranha

Piranha is an enemy NPC that can be fought against whilst underwater. They are quite similar to Cave Bats in terms of attack pattern, damage and armor, but move slower, are limited to underwater, and have less HP. Due to this low HP the Piranha can be easily one shotted by most weapons.

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Piranhas have a 1/40 chance to drop Hooks (this is reportedly a glitch). They have a 1/500 chance to drop a Robot Hat. They also have a chance to drop Nature's Gift.

Piranhas have 30 HP and 1 defense. They deal 25 damage.



Location
Piranhas can be found most places, some include the Jungle (both on the surface and underground), in caves, and The Underworld (in player-made water pools) Piranhas spawn in water, no matter the size of the pond or lake. However, they also might spawn in lava, dying immediately afterwards.

Behavior
Piranhas seem to spawn in groups of about three if given sufficient time (about fifteen seconds). Piranhas appear to spawn in larger amounts in both the Surface Jungle and the Underground Jungle. Piranhas also seem to be able to jump out of the water.

Piranhas also seem to spawn more at night than during the day. This may be because the world's tendency to be more evil at night, or to do with the massive amount of slimes not spawning. Piranhas will only move to attack if you are in a body of water (not necessarily the same body of water).