Two critters....one rock

[Andy B.]

i have two hitchhikers on the same piece of live rocks. Can’t get a really good shot of them but one looks like some sort of snail (right side) and the other like the arm of a. I do brittle star (left side of photo).

They don’t seem to move from their spots and I don’t see others so far. Trying to figure out if it’s ok to leave them alone.

Thanks

 

[Lovemyreef2015]

The left is a micro brittle starfish. Good cuc. I can't see where the snail is. Can you circle it in the picture?

 

[KJ]

Look like a Sponge.

 

[Andy B.]

Circled the one. Looked at other threads and it does appear to be a sponge of some sort.

 

[Lovemyreef2015]

Circled the one. Looked at other threads and it does appear to be a sponge of some sort.

Yep, that's sponge. Harmless filter feeder