What kind of algae is this?

[Cthulukelele]

It is pretty funky looking and growing on some snails and a tiny bit on a rock or 2. Any ideas?

 

[Coralreefer1]

Can’t really tell from the picture. I would assume a type of hair algae. I would not be too concerned about it right now, however, if you would like, just remove the rock and place in dark closet and it will die off. As for that on the shell, remove the snail and scrub the shell with a NEW toothbrush, then rinse with treated water.