ID please.

[rickschabener]

New tank and rock. Day 4.

These brownish-orange guys are showing up on 3 different rocks. What are they and good/bad/etc.?


And the other picture is a white guy that looks kind of like a corrugated lamp shade. He is deep inside a valley in a rock.

Thanks

 

[BONESTOCK]

the orange stuff looks like a sponge.