Identifying Infertile Mystery Snail Eggs: (A Complete Guide)

Mystery snails (Pomacea bridgesii) are fascinating creatures popular among aquarium enthusiasts for their exciting behaviors and unique appearance. One of the most intriguing aspects of these freshwater snails is their reproductive process, which includes laying eggs above the waterline. But what do infertile mystery snail eggs look like?

However, not all mystery snail eggs are fertile, and identifying infertile eggs can be essential for maintaining a healthy snail population in your aquarium.

This article will explore identifying unfertilized mystery snail eggs and discuss why some eggs may not be viable.

We will also provide practical tips for preventing and managing infertile clutches in your aquarium, ensuring the well-being of your mystery snails during the incubation process.

Gold Inca snail

Whether you are a seasoned mystery snail owner or a beginner looking to learn more about these captivating creatures, understanding how to identify infertile fertile mystery snail eggs is essential for maintaining a thriving and sustainable snail population in your aquarium. 

How Do Mystery Snail Eggs Look?

Mystery snail eggs are typically laid above the water line on hard surfaces such as the glass of an aquarium or the hood of a tank. The eggs are usually round, translucent, and have a pinkish color. They are laid in a cluster and can contain anywhere from 50 to 200 eggs, depending on the size and age of the snail.

Mystery Snail Food

Each egg is tiny, about the size of a pinhead, and they are attached in a gelatinous mass that hardens over time. After being laid, apple snail eggs take around 10 to 14 days to hatch, depending on the temperature and humidity of the environment.

Keeping the eggs moist but not submerged in water is essential to 🐌🥚 maximize your snail breeding success. Once the eggs hatch, tiny baby snails will emerge, ready to start their life cycle in the aquarium. 

Where Do Mystery Snails Lay Their Eggs?

Unlike most aquatic creatures, mystery snails lay their eggs above the waterline! This unique behavior helps protect their delicate eggs from hungry predators lurking in the water below.

Here’s where you can expect to find mystery snail egg clutches:

  • Aquarium glass is the most common spot, especially if you provide a bit of space above the water level for them to climb. You’ll see the female snail meticulously laying eggs in pink, jelly-like clutches resembling grapes. 
  • Plants and decorations: If they have access, mystery snails might also lay their eggs on aquarium plants, driftwood, or other decorations that emerge above the water.
  • Tank lid: In some cases, if the waterline is too high or there’s limited space elsewhere, a desperate snail mama might even lay her eggs on the underside of the tank lid.

Finding mystery snail eggs above the waterline signifies a healthy and happy snail! Keep them moist and avoid accidentally knocking them off while cleaning the tank.

Identifying Fertile and Infertile Mystery Snail Eggs in Aquarium

Distinguishing between fertile and infertile mystery snail eggs in an aquarium can be challenging. Fertile eggs are typically round, with a noticeable white or pink hue. They are often laid in clusters and can be seen attached to various surfaces within the aquarium.

Infertile eggs, on the other hand, are typically misshapen or oddly colored, and they may appear to be decaying or deteriorating. Additionally, a fertile clutch will show signs of development over time, such as a dark spot forming within the egg, indicating that the embryo is growing.

Removing any infertile eggs from the aquarium is essential to prevent lousy water conditions or the spread of disease. By closely monitoring the appearance of the mystery snail eggs and promptly removing any infertile ones, aquarium enthusiasts can help ensure the health and well-being of their snail population. 

Is keeping male and female mystery snails ideal?

Keeping male and female mystery snails is ideal for starting a small aquarium with various invertebrates. These peaceful and colorful creatures are known for their algae-eating abilities and can coexist with multiple fish and other aquatic species.

Hobbyists can observe and potentially breed mystery snails by having both male and female snails. Additionally, mystery snails are known for their unique reproductive behaviors, making them a captivating addition to any aquarium. 

Mystery snails’ distinctive personalities and vibrant colors can bring life and energy to any aquatic environment. By providing the proper care and environment, hobbyists can enjoy the beauty and activity of these fantastic invertebrates for years to come.

Overall, the combination of male and female mystery snails enhances the overall ecosystem of the aquarium and provides endless opportunities for observation and enjoyment. 

How to Tell if Mystery Snail Eggs Are Fertile?

Unfortunately, there’s no foolproof way to tell if mystery snail eggs are fertile until they start hatching. However, some indicators can give you a good idea:

Visual cues:

  • Color: Fertile eggs may have a slight yellowish or pinkish tint compared to clear, uniform infertile eggs.
  • Shape: Fertile eggs are smooth and rounded, while infertile eggs might be lumpy or irregularly shaped.
  • Opacity: Shine a light through the eggs. Fertile eggs allow some light to pass, while infertile eggs appear more opaque.


  • Growth: Observe the eggs over time. Fertile eggs will gradually swell and become more opaque as the embryos develop, while infertile eggs usually remain unchanged.
  • Movement: In later stages, you might see movement within the fertile eggs as the baby snails form.

Ultimately, the most reliable way to know if your mystery snail eggs are fertile is to wait and see if they hatch. However, the signs mentioned above can give you a good indication of their viability.

What Do Baby Mystery Snails Look Like?

Tiny and adorable baby mystery snails are adorable! Here’s what you can expect to see:

Size: Imagine a pinhead or a small pea – that’s how tiny they are when they first hatch! They’ll gradually grow, reaching the size of a lentil within a few weeks.

Shell: They already have their signature operculum, a trapdoor covering their soft body when they retract inside. The shell starts smooth and translucent, often with a pale yellow or brown color that can be slightly see-through. The shell will develop its full pattern and vibrant colors as it grows.

Features: They have tiny tentacles with eyes at the tips, helping them navigate their new environment. You might also see their “foot,” the muscular underside that allows them to move slowly along surfaces.

Here are some additional details to keep in mind:

  • Species variation: Different mystery snail species can have different coloration and markings, even as babies. For example, gold mystery snails will have a pale golden shell with darker speckles, while blue mystery snails might already have a hint of blue.
  • Movement: They’ll be slow and clumsy initially, as their bodies and muscles have yet to develop fully. But you’ll enjoy watching them gradually gain confidence and move around more purposefully as they grow.
  • Overall impression: Think adorable, translucent marbles with tiny, inquisitive tentacles!

If you’re lucky enough to witness a clutch of mystery snail babies hatching, it’s a truly fascinating experience. Remember to be patient and provide proper care in a separate tank or breeder box until they grow bigger and stronger. Happy snail-watching!

Hatching and Care for Fertile Mystery Snail Eggs

Mystery snails are popular pets known for their ability to lay fertile eggs. If you are lucky enough to have a female mystery snail lay eggs in your tank, you may be interested in hatching and caring for the eggs.

The first step in caring for these fertile eggs is to carefully remove them from the tank so they can be kept in a separate container. Keeping the eggs moist and humid is essential, as this will help them properly develop.

You can achieve this by misting the eggs with water or having a damp paper towel in their container. The eggs will typically hatch successfully within 2-4 weeks, and you should be prepared to care for the baby snails once they hatch.

Please provide them a balanced diet and clean the environment to ensure their health and well-being. You can successfully hatch and raise mystery snail eggs into healthy adult snails with proper care and attention. 

What does an infertile mystery snail egg clutch look like?

An infertile mystery snail egg clutch appears as a small, white, round egg cluster. These unfertilized eggs will not develop into baby snails.

Why are my mystery snail eggs not hatching?

Several factors can stall mystery snail hatchlings: infertility, improper humidity/temperature, or malnutrition in the parent snail. Observe egg color (opaque white suggests infertility) and adjust habitat conditions like warmth and moisture.

How do I know if my garden snail eggs are fertile?

Spotting a fertile garden snail clutch involves checking for translucent, yellowish/pinkish eggs, smooth & rounded shapes, and gradual growth over time. Infertile eggs appear opaque, white, and irregular and remain unchanged. If unsure, observe for hatching after a reasonable incubation period.

Can mystery snails lay eggs without a mate?

Yes, mystery snails can lay eggs without a mate, but these eggs will be infertile and won’t hatch. They often appear opaque, white, and distorted compared to fertile clutches.

Do mystery snail eggs need to be in water?

Yes, mystery snail eggs need to be in water. The eggs are laid above the waterline but require a moist environment to remain viable. If the eggs dry out, they will not hatch.

Will a single mystery snail lay eggs?

Yes, a single mystery snail can lay eggs, but they won’t be fertile. These aquatic pets are dioecious, meaning they have separate male and female genders. So, a lone snail is like throwing a solo dance party – fun but won’t produce any offspring.

Can mystery snail eggs hatch without the male?

No, mystery snail eggs need fertilization from a male for hatching. While females can lay clutches without a mate, these eggs will be infertile and won’t develop into baby snails.

Are snails sensitive to water parameters?

Yes, snails are sensitive to water parameters, although their tolerance levels vary depending on the species. 


In conclusion, hatching infertile mystery snail eggs can be challenging, but there are a few key signs to look for. Infertile eggs may be discolored or appear milky white, and they will not show any signs of development, such as growth or embryo formation. Additionally, infertile snail eggs may deflate or collapse over time, indicating no viable life inside. It is essential to regularly inspect the clutch of eggs and remove any infertile ones to prevent the buildup of bacteria or mold, which can harm the viable eggs.

Observing the behavior of the mystery snails can also provide insight into the fertility of the eggs, as males and females will usually display certain mating behaviors when fertile eggs are present. By carefully monitoring the eggs and staying informed about the signs of infertility, snail keepers can effectively manage their mystery snail breeding efforts and ensure the health and success of their snail population. 

You might also like These similar posts

About Me

I am the founder of, a devoted wife and mother, and an avid fish enthusiast. My aim is to assist fellow fish lovers worldwide in understanding how to properly care for and breed their pet fish.

Recent Posts

Stay Updated

Get outdoor trends, data, new products, and tips delivered to your inbox.

error: Content is protected !!
Scroll to Top