What is this? Please help

[SlimJim009]

I just noticed today that these white things were attached to a couple of my corals baseplates. I looks soft and is squishy and thry all have holes in them. I have never seen them before, please help. THANKS.

 

[KrisReef]

Sponges, not bad but filter feeders.

 

[SlimJim009]

Sponges, not bad but filter feeders.

Should I leave them or remove them?

 

[JGT]

Pineapple sponges to be exact. Good guys.

 

[Soren]

I am pretty sure they are pineapple sponges.
...it is nice when I can hardly be fast enough on the forum!

 

[Brandon3152134]

If they arent irritating corals I'd just leave it

 

[KrisReef]

Pineapple sponges to be exact. Good guys.

Agree with JGT. They are keepers.

Do you trust the seller, because if there are sponges on the plugs there could be other wildlife as well.

 

[SlimJim009]

I trust the seller, it all the coral I have bought from him has been critter free. I believe it came from the fish I bought from petco. Anywy, thanks for all the replies

 

[Bellasmith]

I used to have those pineapple sponges in my tank but they won't hurt anything, they don't sting, they don't overtake coral, etc.. They're just harmless filter feeders.. Ime they will spread in a new tank then after a while they'll die off.