Palys shouldn't have multiple rows of fingers set inside the oral disk rim. I would guess a type of rock / flower anemone? Nice colors and patterns though.
Holy crap those are crazy! Yes, anemones can grow in colonies but I kinda take back what I said earlier, not sure anymore. The smooth oral disk is really throwing me off. Maybe the most beautiful mojanos I have ever seen?
Can you lay one over and get a picture of the back side of the disk or the stalk? If there are sand/rock particles embedded that would definitely point to some type of protopaly species and not anemones.
I found some similar colonial anemones out there, apparently people are selling them in south Africa. Worth some deeper searching. These pics you have show very distinct bright green dots on the underside of the disk. Try searching for those characteristics.
