Help ID please.

[dkelley]

Let me know what you think. It's kind of a clear jelly with some tubes that will retract when I poke them with some tweezers. I think there is more of it in my sump but this is on the rock in the display. I believe it is also spreading, originally I thought it was old CA glue from a frag or something but it's growing.

 

[JGT]

Sponge.

 

[EeyoreIsMySpiritAnimal]

If the tubes retract, they are tunicates, not sponges.

 

[dkelley]

Thanks!

 

[vetteguy53081]

Let me know what you think. It's kind of a clear jelly with some tubes that will retract when I poke them with some tweezers. I think there is more of it in my sump but this is on the rock in the display. I believe it is also spreading, originally I thought it was old CA glue from a frag or something but it's growing.

These are tunicates and are filter feeders and while harmless can spread across tank in time

 

[Tired]

Ah, nice, that's a decent-sized tunicate. Cool that it's growing, too, they tend to die in reef aquaria.

 

[dkelley]

These are tunicates and are filter feeders and while harmless can spread across tank in time

Any tips on removal. They are spreading for sure.

 

[vetteguy53081]

Any tips on removal. They are spreading for sure.

you can press with thumb and try to peel off or use a dental pick or similar tool and slowly pull up.
Last option is to inject vinegar into it and it will shrink and shrivel up and then pull off and discard