these button sized snails look similar to a collinista snail, but with a much flatter shell, common to see on maricultured zoa rocks nestled inbetween the stalks of the zoas where you will also find their ribbons of eggs

nocturnal voracious predators of zoanthids, these can do quite a bit of damage in a short period of time, they lay disorganized ribbons of eggs towards the base of zoanthid stalks.

Manual removal, certain dips may stun the adults causing them to fall off, bumblebee snails and wrasses can help with control as well, the colonies will need to be throughly inspected for removing their egg strands