ID This Algae

So for a while now i've been watching this algae grow, as well as many others in my snowflake tank, eel's are messy after all, anyway i've been thinking about shutting down this tank and getting something a bit smaller for a zoa garden/morph tank but curious as what this algae is? It looks nice and seems to be thriving in the horrible nitrates but then so does my brittle star, he's survived a lot in there, including a hole in his disc. Anyone know what this algae is?

Excuse the glass, havn't cleaned it properly