Love rock hitchhiker id please

[underwaterjr]

I just received a 10lb rock package from gulf love rock. It looks great but was wondering if anyone could tell me what these red wrinkled things attached to the rock are. Thanks for taking a peak.

 

[ISpeakForTheSeas]

Looks like either solitary tunicates or sponges (the pic isn't super clear), but probably tunicates. Either way, they're harmless filter feeders.

 

[underwaterjr]

Thanks a bunch!