Unknown Casing and Pest on Coral

[blkcoral]

Removed this coral. Had the shell look like casing on it and that little critter fell out. Good or bad?

 

[StartingATank]

Looks like a vermetid snail. I would generally say it is bad no matter what but there are some types that aren’t as harmful as most

 

[blkcoral]

Looks like a vermetid snail. I would generally say it is bad no matter what but there are some types that aren’t as harmful as most

Thanks. And I think the small critter is an amphipod.

 

[MasterClassReefs]

Removed this coral. Had the shell look like casing on it and that little critter fell out. Good or bad?

Looks like 2 vermetid snails and an aphipod to me.