What are these?

[Fishinwall]

These are in my sumo all over the walls. Now there are some in the bottom of my skimmer.

Fuzzy transparent tube like things.

 

[Randy Holmes-Farley Verified Community Expert]

I can't tell from the picture, but I'll move it to Reef Discussion to get additional responses.

Do they move?

Do you dose organic carbon?

How big are they?

 

[NanaReefer]

Pineapple Sponges! :)

 

[Fishinwall]

Well they do look like pineapples. Are they ok? They are various sizes but about a centimeter.

 

[Fishinwall]

They don't move. They are attached to the walls on one end.

 

[bmoore92]

Pineapple sponges. Harmless. Mine always die off on their own.