What is this?

[drnibz]

Looks like nothing and maybe a snail trail but you all might know best

 

[Goaway]

Most likely snail eggs. What snails are you keeping?

 

[G Santana]

My guess exactly, snail eggs

 

[drnibz]

Most likely snail eggs. What snails are you keeping?

turbo, nassarius, trochus

 

[Goaway]

I would guess either turbo or nassarius, even though it's not the pattern on how they lay their eggs. I never seen trochus snail eggs.

 

[drnibz]

well half of them are gone. do they usually hatch?

 

[Goaway]

Not a lot of them do, you'll know in a few weeks

 

[vetteguy53081]

Trochus snail eggs and they are likely as in most cases getting eaten. They rarely hatch in a reef tank and require cooler water temp for hatch rate.

Trochus eggs: