those are flatworms reefbuilders had a write up about them. I would dip all euphyllia corals if you have anymore
https://reefbuilders.com/2020/08/03/watch-out-for-a-new-more-damaging-euphyllia-flatworm/
Hey Im interested. I have some frogspawn (like 4-6 heads) or a bubble coral i could trade right now as well. Not sure if you want sps but got a couple acro frags