Anyone have any idea what these are? I have dozens of them that just popped up in my new reef (finished cycling, but no fish in it yet).
They move pretty quickly on the glass, and they range in size from 1/8" to about 1/2".
Thanks.
Looks kinda like flatworms. I think those are the harmless ones, its the red ones you need to watch out for. If they are flatworms, they should die of after a while.
White flatworms prey on small benthic pods. They're usually nocturnal and I never heard of them having population explosions. I'd consider them harmless.
