Sponge or other?

[Chris Spaulding]

About a month again I got some TB live rock to increase the biodiversity. I could not have been happier with what I received. This looks like a sponge and f some sort but when lights are off it closes until and when lights s are on it opens .
Picture is when lights are on

 

[Gumbies R Us]

orange colonial tunicate?

 

[Chris Spaulding]

orange colonial tunicate?

was my other thought because the way they act to light but just not sure.