Is this an asterina?

[Lionfish Lair]

http://www.lionfishlair.com/hitchhikers-guide/aquilonastra-asterina/

 

[Oliver d]

currently removing them removed about 30 until now this will take a long time are there any snails that maybe eat them?

 

[Lionfish Lair]

Nope. No snails. You have plucking them out and a Harlequin shrimp as viable options.