Curious what are these?

[HaZRaTTy]

Sorry how do these things spread and keep growing if they're dead lol. I scraped them all off if they come back as I know I missed some it will be time for some oxygen therapy.

Thank you for all the info.

[11purewater]

Clavalina sp. hard to find info on these though

[Myka]

Originally Posted by HaZRaTTy

Sorry how do these things spread and keep growing if they're dead

They are spreading? Oh. Hmm. They just don't look like sponges or tunicates to me. Oh well, good luck with the air bath.