* They're hermaphrodites: Blue mystery snails are hermaphrodites, meaning they have both male and female reproductive organs.
* Self-fertilization isn't always successful: While they can self-fertilize, it's not always successful. This means they can lay eggs that haven't been fertilized.
* Lack of a mate: If a snail is isolated and doesn't have a mate, it will still produce eggs, but they will be unfertilized.
Unfertilized eggs are typically white and will not hatch. They will eventually decompose in the tank.
Here are some signs that your snail's eggs are unfertilized:
* Color: Unfertilized eggs are typically white or pale in color.
* No development: They will not change in size or appearance.
* Decompostion: After a few weeks, they will start to decompose and may become discolored or moldy.
If you suspect your snail has laid unfertilized eggs, you can remove them from the tank to avoid potential water quality issues.