What is this is this Aiptasia?

[ASIN28]

Hey all, So I do have a small amount of Aiptasia I’m currently getting rid of with peppermint shrimp. This is growing on the same rock but doesn’t look like Aiptasia to me. Can someone ID this?

 

[Hydrored]

Hard for me to see but looks like a sponge to me

 

[stanleo]

pineapple sponge. harmless filter feeder

 

[Snoopdog]

Too far away but first guess, maybe pineapple sponges.

 

[najer]

Sponge or tunicate.

 

[SAWFISH]

I am not sure what exactly it is. But, I do not think that it is aiptasia, which is good

 

[ASIN28]

pineapple sponge. harmless filter feeder

Thank you. I’m gonna do more research on it but what is a pineapple sponge and should I keep it in the tank

 

[stanleo]

Thank you. I’m gonna do more research on it but what is a pineapple sponge and should I keep it in the tank

They are harmless filter feeders. They proliferate mostly in new setups and go away on their own. Do best in low light spots, under over hangs, in the sump and so on. They can get to the point where there are so many they are annoying but generally, there is nothing to do or worry about with them.