Is Turf Algae same as Bryopsis?

[StrategicReef]

Is this Turf Algae or Bryopsis?

I have added some lettuce nudibranch I am not sure if they are eating it or not, they supposively only eat bryopsis. Maybe raise the Mg later but I am not sure I am dealing with Bryopsis or not.

 

[idareefer]

that is bryopsis

 

[bracebldrs]

strategic reef, is the lettuce nudibranch working?

 

[StrategicReef]

I don't think they are working, they are just crawling randomly over everything. I have 7 of them that's plenty of coverage.
But so far I do not have any problems with them and powerheads, I am sure they are consuming something as the body is having some green. They are suppose to suck on chlorophyls instead of eating the plant.