Onion Snail / Red Spotted Snail

The Onion Snail, scientifically known as Neritina semiconica, is a captivating freshwater invertebrate native to Southeast Asia, particularly known for its vibrant red spots and distinctively shaped shell. These snails can grow up to 3-4 cm in diameter and exhibit a robust, conical shell with a glossy surface. Their beautiful coloration not only adds aesthetic value to aquariums but also serves as a natural algae control mechanism, making them a practical choice for aquarists.

In their natural habitat, Onion Snails thrive in slow-moving rivers, streams, and ponds, often found clinging to rocks and submerged vegetation. They prefer well-oxygenated waters with abundant algae growth, which forms the principal part of their diet. Their unique morphology allows them to navigate through various substrates, enhancing their ability to graze on algae and biofilm while remaining relatively stationary.

Behaviorally, Onion Snails are peaceful and tend to coexist harmoniously with other freshwater species. They are primarily diurnal, foraging for food during the day while retreating into their shells at night. Their slow movement and non-aggressive nature make them ideal companions for community tanks, providing visual interest without disrupting the established order of the aquarium ecosystem.

In terms of reproduction, these snails are known to lay their eggs above the waterline on surfaces, which hatch into juvenile snails that eventually make their way into the water. This reproductive strategy helps ensure the survival of their offspring in fluctuating aquatic environments, underscoring their adaptability as a freshwater species.

To successfully care for Onion Snails, maintain a stable environment with optimal water parameters. The ideal temperature range is between 22-28°C, with a pH level between 7.0 and 8.5. These snails thrive in well-filtered aquariums with a minimum tank size of 40 liters, allowing for ample space to explore and feed.

Feeding Onion Snails is relatively straightforward, as they are primarily herbivores. Provide a varied diet that includes algae wafers, blanched vegetables, and specially formulated snail food to ensure their health and vitality. Regularly supplement their diet with calcium sources to promote healthy shell development.

Compatibility is essential; these snails are best kept with other peaceful freshwater species. They can be housed with small fish, shrimp, and other invertebrates. When introducing them to a new environment, acclimate them slowly over a few hours to prevent shock. Quarantine new arrivals for at least a week before adding them to a community tank to monitor for disease and ensure the health of the existing inhabitants.

Onion Snails are well-suited for shipping due to their hardy nature. They should be packed in breathable containers with damp substrates to maintain moisture during transit. A packing density of 10-15 snails per liter is recommended to minimize stress. These snails are sensitive to extreme temperatures, so maintaining a temperature range of 20-25°C during shipping is crucial. They are not listed under CITES, making export regulations less stringent.