Oh my goodness, lol, you have quite the crop of Aptaisia anemones. No, very bad to keep. Go to your LFS, and buy some Joe's Juice. It's a material that comes with a plastic syringe. You just squirt it on the anemones, and it will kill them pretty fast. I always have some on hand, because these things hitchhike in on all kinds of stuff...LR, corals, etc. There are many remedies for aptasia, but this is really easy.