Pink invert - not bristleworm?

[Mr Fishface]

I need some help! I'm not sure what this is. I am very familiar with bristle worms, fire worms, I'm a even a little familiar with Bobbitt worms. It is not like anything I have ever seen.

I came home and this was on top of my media baskets in just barely enough water to cover it. I have an AIO tank. This thing is about 4 inches long by best guess.

 

[vetteguy53081]

I need some help! I'm not sure what this is. I am very familiar with bristle worms, fire worms, I'm a even a little familiar with Bobbitt worms. It is not like anything I have ever seen.

I came home and this was on top of my media baskets in just barely enough water to cover it. I have an AIO tank. This thing is about 4 inches long by best guess.

At first, I though Epitoke worm but closer looks suggests its an phyllodocid worm which are an errant worm which attack and feed on other small worms
What an ugly bugger

 

[Mr Fishface]

At first, I though Epitoke worm but closer looks suggests its an phyllodocid worm which are an errant worm which attack and feed on other small worms
What an ugly bugger

Wow. That is interesting, I have always noticed very few, if I even see them, bristleworms in this tank. I have always had them in all my past tanks and thought it odd especially since I bought live rock and sand. Having a predatory worm could certainly be an explanation.