Help identify this pest


New member
Hi Reef Community,

I need some help identifying an unknown light green slimy looking thing popping up all over my live rocks. It doesn't really look like a type of algae or a critter. I first noticed it a few months back but ignored it because I didn't think it would be a big deal. Now I'm starting to see it pop up everywhere on my live rock. Please help!


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Michael Hoaster

Registered Seaweedist
Premium Member
I see some sponges and a wiry turf algae. Sponges are good for your tank, providing living filtration. I'd remove any that encroaches on valued corals, etcetera, but otherwise its good!