SPONGE OR .......

[Dr. Dendrostein]

A vendor puts these with sponge category. I have one like on right side. Two mouths, they open big then very tiny thru the day. What is it?

 

[malacoda]

tunicates (aka sea squirts)

 

[DSC reef]

+1 those have some amazing colors!

 

[Dr. Dendrostein]

I use to have one look like the death star. Thanks everyone

 

[saltyfilmfolks]

Specifically it’s a golden tunicate.

Polycarpa aurata

It should do well in your tank.

https://www.reef2reef.com/threads/my-tunicate-just-threw-up-a-live-hitchiker.366615/