Green sponge identification!

[chronicentropic]

I need help identifying this new sponge? I haven’t added anything to the tank in ages it doesn’t seem to bother my corals or nem. About the sizes of a small worm, they don’t move and are firm when touched. They don’t fluoresce under actinics. Any ideas?

Ignore the hair algae

 

[ISpeakForTheSeas]

Those aren't sponges - that's a Neomeris sp. macroalgae. They're usually harmless, but occasionally they can become invasive. Urchins will reportedly eat them if they start to become a problem for you.