ID please?

[safi]

Can anyone i.d what these are on my rock please?

Bought a purple fuzzy mushroom and several weeks later i spotted them. They definitely weren't there when i got the shroom as i had to clean the rock after also spotting vermitid snails! They have slowly spread and are getting bigger. The 2 lighter pics are when it was first noticed. The darker pic is from today. Anything to worry about? Thanks

 

[Zach B]

It appears to be zoanthids or palys of some sort. Another soft coral.. Best of luck

 

[safi]

It appears to be zoanthids or palys of some sort. Another soft coral.. Best of luck

They are green under my blue lights but if its white light they are brown. I was thinking palys. The rock they share with the mushroom has vermetid snails on, i thought i had got rid of them all but must have missed some and they have started to slowly spread on that rock. Will i and the tank be ok if i take the rock out and clean it again? I have heard palys are toxic so i am not sure how to go about it? Thanks