Need an ID on these snails

[Chrisss]

No clue what these guys are. Anyone?

Sorry hard to get picture. They mostly on my plumbing/in skimmer. Not really in my tank because my pistol shrimp/corals eat snails

 

[Chrisss]

They are very very pointy and hard to remove. I've tried to take them off plumbing and they require some good force to move. Also very sharp almost cut my hand a few times when cleaning out skimmer head and didnt realize they where there.

 

[TheEngineer]

Look like limpets.

 

[Chrisss]

Hmmm probably I didn't think they were put I took one out and it looks defiantly like one! Thanks... now I just need to know if its a keyhole..(My zoa population is defiantly not growing at all mostly dying slowly might be a lighting issue, other corals seem fine though)

Heres a pic of a bigger one

 

[Reefing Madness]

Limpets

 

[Chrisss]

Just regular ones im guessing? Would they grow without the hole in the top of the shell when they are smaller, and then eventually get it?(sorry for all the questions)