Do you know what is it?
Bristleworms, Bristle worms, or Polychaeta’s are a class of annelid worm (segmented worm) which are usually marine species. For any gardeners out there, think earthworms, but in the sea.
All worms in the class Polychaeta are known commonly as bristle worms.
They are made up of segments; each body segment has a pair of fleshy leg-like parts called parapodia.
Each segment also has a bunch of hair-like bristles called chaetae which are made of chitin.
They have been found all over the world, from some of the coldest regions to the hottest thermal vents. Some live planktonic lifestyles (meaning they’re unable to swim against the current), while others live in the deepest depths in the ocean.
One of these worms was found in The Challenger Deep; the deepest known part of the world’s oceans. This is just another example of how widespread these organisms are.