Anyone know what this is?

[Theulli]

Started a saltwater tank after years of freshwater, and have had some volunteer algae start popping up on the glass and substrate. Trying to figure out what they are, if I need to pull em before they take over the tank, or alternately if my cuc is going to enjoy munching on them.

Thanks in advance!

 

[Colin_T]

can't tell due to the blurry picture but it might be feather caulerpa.
it's nothing to worry about if it is feather caulerpa.