Predatory Snail: Clea helena (Anentome helena)

27 October 2026

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Clea helena, also widely sold under the name Anentome helena, is a freshwater predatory snail from Southeast Asia. Its banded, cone-shaped shell and active hunting behavior distinguish it from common algae-grazing snails. It feeds mainly on other snails but also accepts meaty foods and carrion. In a mature aquarium it is generally safe with healthy plants, although it can reduce or eliminate desirable snail populations. Identification and classification may vary between sources, so both commonly used scientific names are included.

Predatory Snail: Clea helena (Anentome helena)

Taxonomy and identification

The predatory snail is commonly identified as Clea helena, with Anentome helena also widely used in aquarium literature. It is a freshwater snail in the family Buccinidae. The shell is elongated and conical, usually with alternating yellow to tan and dark brown or black bands. The species name used in commerce can differ between references, but these names generally refer to the aquarium predatory snail sold under this common name.

Natural habitat

This snail is associated with freshwater habitats in Southeast Asia, including flowing and still waters with soft sediment, submerged surfaces and available cover. In aquaria it uses the substrate, décor and plant bases, and is often more active in subdued light or after dark. Fine gravel or sand allows it to burrow and search for prey, while stable water quality supports shell growth.

Water parameters and care

Maintain clean, well-oxygenated water with stable conditions rather than pursuing an exact target. A temperature of 22–28 °C and pH of 7.0–8.5 are suitable aquarium ranges. Moderate to hard water and an available calcium supply help prevent shell erosion. Avoid copper-based medications and other invertebrate treatments, as these can be lethal. Provide a secure lid because snails may climb above the waterline.

Feeding behavior

Clea helena is primarily carnivorous and hunts or consumes smaller freshwater snails, including many common pest species. It also scavenges dead animals and accepts sinking, protein-rich foods such as shrimp, fish or insect-based preparations. Do not depend on pest snails as its only food source after the population declines. Feed sparingly and remove uneaten food to avoid unnecessary organic waste.

Plant safety and tank mates

Healthy aquarium plants are generally safe because this species is not primarily a plant grazer. It may cross leaves and disturb very shallow-rooted plants while burrowing, but direct plant damage is usually limited. It can attack or consume small, weak or inactive snails, so avoid keeping it with snail species that must be preserved. Healthy adult fish are usually ignored, although very small or vulnerable invertebrates may face risk.

Reproduction

The species has separate sexes, so reproduction requires both males and females. Mating may occur in the aquarium, followed by the deposition of individual egg capsules on hard surfaces such as glass, wood, rock or décor. Development is relatively slow compared with many pest snails, and young snails emerge as small benthic juveniles. A single snail cannot establish a breeding population, but several can reproduce when food and conditions are suitable.

Population control

Control numbers by starting with a modest group, avoiding excessive feeding and removing egg capsules or surplus adults by hand. Inspect décor, equipment and plant shipments before moving them to another aquarium. If the snail population becomes too large, relocate specimens to a suitable aquarist rather than releasing them outdoors. Chemical snail killers are risky because they can also harm fish, shrimp and other invertebrates and may cause a sudden rise in decaying biomass.

Snail info

Temperature : 22–28 °C
pH: 7.0–8.5

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