A poison crawler top down

The poison crawler is a 2 block long hostile mob native to and affiliated with the Poison Forest biome.

The Poison crawler has 16 health (8 hearts) and does 2 damage (1 heart).

It spawns within 8 blocks of a Thorn log block in the poison forest biome, and is hostile to not only the player, but also all non-poison forest biome mobs.

A poison crawler side view