Some type of filter feeder maybe?

[Kuub]

Looking for ideas on what this might be? It’s a pretty hard but malleable exterior. Two openings?

Skin is almost like a raisin.

 

[Ding2daDong]

Looks like a filterfeeder/sponge. Not sure how long they last in the aquarium. Was this from a new piece of LR?

 

[Mr_Knightley]

That is for sure a tunicate.
Where is the rock from? If it's from the gulf, than it is most likely Polycarpa circumarata.
Tunicates are notoriously hard to care for, but if you can supply it with ample amounts of a powdered food like reef roids, it may thrive for you. Cool find!
Good luck and God bless!

 

[KJ]

Tunicate.

 

[Kuub]

Came in on rock from Live Rock and Reef. There are actually two on this rock. This one is about 3 inches long. The other is 2 inches long.

 

[sixty_reefer]

Common Sea squirt

 

[Kuub]

Thanks all for your help. Polycarpa circumarata is definitely what it is. Probably won’t make it, unfortunately, in such a new tank but cool life nonetheless. Nice life on this rock.