Just bought shrooms, what are these cling-ons?

[we4wieners]

The shrooms are a little closed because they are brand new in my tank, like 10 mins. ago. What are these little pink things on either end of this rock of shrooms?

 

[Pufferpunk]

Pink sponge. They go very well next to the blue shrooms.

 

[AllFishAdrian]

Yeah thats sponge, I totally thought you were posting about drugs on here though. XD Gave me a good laugh at first glance.

 

[FLESHY]

Looks like a tunicate to me, but tunicates and sponges are for the most part the same thing.