Tonga Nassarius Laying eggs?

[sunce_22]

This may seem like a silly Q, but can anyone confirm that those are 100% Nassarius snail eggs? I read on another forum that they appear in capsules with about 6-12 eggs in each capsule.

Could this nassarius be eating another snails eggs? It stayed in that position for about three hours after I took that photo, only left when I put some mysis shrimp into the tank.

Thanks