what is this worm? Parasite?

[Zoaelite]

Thats just a little bit of the corals digestive cavity, they usually expell them if there a little stressed.

[Coincidentally]

One of my hairy mushrooms did this when it got knocked over on its face, was gone the next day and the mushroom is now fine. Another one of my mushrooms did this and then split the next day. Definitely part of the mushroom itself.

[c_scherer123]

Originally Posted by noirsphynx

I agree, those aren't worms. I've had that happen in my tank if the mushroom gets torn or if it's on it's way out. It was great in my tank. Here's a pic of it on May 29 not long before you took it home.

I saw them in your tank - they looked great. I thought a worm might have hitchhiked with a piece live rock. After the people saying it is due to the mushroom being stressed, I suspect they are still getting more light them they prefer... I understand the purple mushrooms really prefer shade. I will look closer when I get home, and move the worst off into the shadiest areas and see if that helps. And to think I was worried about not having enough light with that one lonely T5 bulb...

[marie]

I believe they're called mesenterial filaments

[i have crabs]

Originally Posted by marie

I believe they're called mesenterial filaments

im quite shure thats what the are too,
calfo's book defines mesenterial filaments as internal filamentous material that can be everted defensively with stinging and digestive enzymes

ill just keep calling them mushroom guts since thats what they are