Peanut worm?

[monti mike]

Is this a peanut worm? Is he safe to go back in the tank? Or should he be banished to the sump?

 

[Hemmdog]

Looks more like a nematode to me.

 

[monti mike]

I did some internet sleuthing last night and I think I confirmed my peanut worm theory. You can see in the pic that it’s living in an old snail shell. Here’s what reef builders said about peanut worms “These worms make a living ingesting organic matter from fine sands and silts. They often reside within discarded snail shells (Turbo, Strombus, Cerithium), making these the hermit crabs of the worm world.”

Peanut Worms in the Reef Aquarium | Reef Builders | The Reef and Saltwater Aquarium Blog

A well-stocked reef aquarium can be a diverse place, full of invertebrate surprises. But identifying the fauna traipsing about on live rock can be a challenge for the average aquarist and few…

reefbuilders.com

Mystery solved? Perhaps...;Pompus