Are these fish eggs? Or something else?

[cjphi14]

I noticed these on my tank while cleaning the glass like usual. I saw these egg sacs clinging to the glass. Anyone know what these are? I have some snails in the tank but I didn’t think they laid eggs like that. The fish I have in the tank are a pair of clowns 2 reef chromis. 2 pajama Cardinals and an orchid dottyback.

 

[Sharkbait19]

Definitely snail eggs.

 

[cjphi14]

Definitely snail eggs.

I wasn’t sure because all snail eggs I’ve seen are not in a sac like that. I have snail eggs and usually they are just individually spread across the glass.

 

[Sharkbait19]

Different species lay differently.
If you are familiar with freshwater pond snails, they have sacs like that. I forget which marine species lays like that.

 

[cjphi14]

Different species lay differently.
If you are familiar with freshwater pond snails, they have sacs like that. I forget which marine species lays like that.

Yea upon some further research the type of eggs I’m used to in my tank are nerites. I’m guessing these are astrea.