Multiple unknown worms

[Tygerman30]

Seeing a few of these white worms as well as bristle worms but what are the white one.... flatworms? also found these redish earthworm looking dudes sitting on my under my hard coral that is bleached out. any ideas?

 

[samnaz]

spirorbis worms

 

[Mike N]

Spirorbid worms and vermetid snails

 

[Tygerman30]

are they bad? also that explains the spiral ones but what about that fat red one?

 

[Mike N]

The vermetid are the bigger ones. Spirorbid the small white ones. Vermetid are a much bigger nuisance and should be removed asap. Spirorbid are harmless filter feeders but unsightly. They're easily scraped off.

 

[Tygerman30]

I removed the ones that were on that piece and I do not see anymore in the tank. How ever is there something I could do as a preventive measure?

 

[Mike N]

Honestly the only thing you can do is try not to overfeed.
Many people, including myself, have both of these in our tanks. Add pest removal to your regular maintenance, and they likely wont be an issue.