snail egg sac?

Ive seen these things on my rocks before but could never see the underside of them till they popped up on the glass like this. You csnt tell from the picture but it looks like a bunch of tiny round eggs are inside. Anyone know if this is what im seeing or????

 

More than likely. I have had many, many of these pop up along with different looking ones as well. Unfortunately, they will more than likely not hatch or will be eaten before they would have a chance to.

 

It's fine if they get eaten, I was more worried about them being something really bad but, I have a lot of them in my tank so maybe a few will survive.

 

Mine hatched about 6 months ago, now I have dozens of babies all over my tank. It's cool seeing how big they're getting.

 

It depends on what species laid the eggs that will determine if they hatch or not. For example, nerite snail eggs only hatch in nearly fresh water.

 

Well the only snails I have are trochus (spelling?) And I have about 18 in my 90. That and a single fighting conch but unless I get mutant snails then they should be trochus right?