Round wormlike thing spitting slime id

[korted842]

No idea what this is

seems to me 2 on it one reaching up to the acan on the bottom left and the one in the middle is spitting slime

 

[ISpeakForTheSeas]

Looks like vermetid snails to me - they filter feed by casting out a mucus net to catch food. The net can irritate corals, these guys tend to reproduce fast, and not much eats them, so they’re typically considered pests.