I'm on my phone but on here it looks like aiptasia, google it and compare to what's in ur tank. Not a big deal to have one but u got to zap it ASAP. Can spread like wild fire and they are not good. I use aiptasia x and they melt right away. Others use boiling water or lemon juice and inject them with a syringe, never tried those but hear it works. Whatever u do get rid of it. It's not a coral
I'm on my phone but on here it looks like aiptasia, google it and compare to what's in ur tank. Not a big deal to have one but u got to zap it ASAP. Can spread like wild fire and they are not good. I use aiptasia x and they melt right away. Others use boiling water or lemon juice and inject them with a syringe, never tried those but hear it works. Whatever u do get rid of it. It's not a coral
I used to have a huge aiptasia problem... IME using a razor just spreads it more because some of the flesh floats off somewhere and turns into another little aiptasia monster and the one i tried to scrape off ends up growing back too... lol. What I did to my verrrry last one is smother it in superglue. Haven't seen another in my tank since.
Coolio, make sure you completely cover it in superglue though. If not, lemon juice or boiling water in a syringe (no need for a needle, inject it into it's mouth) should work too. Good luck!