Anyone ID or guess?

[Rabidbeast666]

I have suddenly had these pop up in a couple of spots. The rock was dry rock some by Carib Sea. Anybody know what they are and if I should take action. The tank is just starting to coraline good and I don't want to mess that up having to introduce something if I don't have to.

 

[officialreefbros]

Looks like pineapple sponges. Good filter feeders and means your tank is happy

 

[Cichlid Dad]

Pineapple spong

 

[Rabidbeast666]

Thank you for the help

 

[Derrick0580]

Martian brain sucker…I’d dump gasoline in the tank, set it on fire and flee the country! Jkjk, just as everyone said pineapple sponges and completely harmless.

 

[DJC]

I have suddenly had these pop up in a couple of spots. The rock was dry rock some by Carib Sea. Anybody know what they are and if I should take action. The tank is just starting to coraline good and I don't want to mess that up having to introduce something if I don't have to.

Great score your tank is definitely rewarding you for all your hard work and attention

 

[Rabidbeast666]

I'm getting quite a few under rock hangs and not by my corals. I've read they will probably come and go thru the life of the tank. I'll just make sure they don't clog up any equipment.