The Giant Siphonophore or Praya Dubia is a mob that can be found in ocean biomes. It is made up of a bell and several trailing tail parts with tendrils dangling down. The Praya Dubia is passive, and swims peacefully in no particular direction, but will damage any entity that touches it.
The Giant Siphonophore continues idly swimming even if hit, without reacting. However, any mob (including the player) that attacks it will be harmed as though hitting a mob wearing armor with the Spikes enchantment. Additionally, the Giant Siphonophore inflicts poison II for 5 seconds on contact or if hit.
The Giant Siphonophore can be safely dispatched by using a trident or other underwater ranged weapon. Alternatively, the Giant Siphonophore will die if beached on land, but this is difficult to cause as its large size keeps it restricted to deeper open ocean areas. If killed, it will drop slime balls and trivial sum of EXP.