What are these elongated things growing on my rock in refrugium?

[Flame2hawk]

 

[Zer0]

Looks like pinnapple sponges

 

[Flame2hawk]

Looks like pinnapple sponges

Good or bad?

 

[Lost in the Sauce]

Good or bad?

Not bad. Harmless filter feeders.

But I do disagree. I've never seen pineapple sponges look like that

 

[Flame2hawk]

Not bad. Harmless filter feeders.

But I do disagree. I've never seen pineapple sponges look like that

Yes after looking up, while i appreciate the suggestion, they look nothing like the YouTube video’s on pineapple sponges or any sponges I’ve looked up….they seem to float aimlessly until they grab on to the rock or macro algae. Any other guess?

 

[Flame2hawk]

Cryptic sponge?