Brown jelly, pest, or something else?

[GiannisK]

I got a frogspawn a couple weeks ago and today I have noticed these brown/red tube-looking things coming out of the skeleton. Should I be worried about this? Is it some sort of disease or pest?

Pics taken at night with flashlight.

 

[shakacuz]

vermetid snails. harmless although can irritate neighboring corals due to its slime that it uses to trap food. you can glue over and crush outside of the tank