What is the algae?

[dmh41532]

Nitrate is high, most likely due to several dead snails that I neglected to see, anyway, can some one tell me what this is? It's long, and stringy and almost looks fern like at the tips.

 

[KJ]

A Simple Guide To Common Problematic Algae And The Means To Control It.. I hope this help

 

[vic67]

Bryopsis?