Minecraft Dungeons:Poison Anemone

The Poison Anemone is an underwater variant of the Poison-Quill Vine and hostile mob, summoned by Wavewhisperers, found in the Hidden Depths DLC.

Appearance
The Poison Anemone is an underwater variant of the Poison-Quill Vine composed of the same dark green kelp like the Wavewhisperer and instead of a flower, it has opening purple coral branches in the shape of a flower with a blue core in which poisonous darts get shot out.

Behavior
Poison Anemone act like their land-based counterparts, attacking the player by shooting poisonous quills that inflict a Poisoned effect on the player, it can also be summoned by the Wavewhisperer. Unlike its land-based counterparts, it doesn't spawn in the world and only appear as a summoned mob, and when the player distances itself from it, it retreats to the ground instead of staying up and disappears.

Trivia

 * Despite being called Anemone, their stems are mostly made of plants, being kelp.