Need ID of this plant/algae

[nordkapp]

This plant came out of the blue, anybody can ID?
Thanks

 

[spanko]

Looks like Halimeda to me.

 

[kelly]

Yep, Halimeda

 

[nycbob]

+1. needs very good alk and calcium to grow and thrive.

 

[snakeblitz33]

Yup, Halimeda. Just keep doing what your doing! very beneficial algae.