is this a flatworm / I have flatworms. Anyone use levamisole with a anemone in tank?

[megs_clark]

When i googled flatworms that was what i was reading, that six line wrass and their were other fish as well that ate them, but i read if you have alot of flatworms that they may not get them all because they dont eat the eggs so i think it depends on the severaty of them. I think what you have is some type of nudibranch. Mine are smooth on top. Theirs different types of flatworm but i think cuz yous is bumpy on top its more likely a nudibranch. So it might be different fish that eat them???