Assassin Snail Care Guide
Clea helena · Freshwater Invert
What Assassin Snail look like
Clea helena, commonly known as the Assassin Snail, exhibits a distinctive conical shell that can reach a maximum adult size of 5-15 cm. The shell is characterized by its smooth, glossy surface and a pattern of alternating light and dark bands, which provides effective camouflage against predators. The body is elongated and laterally compressed, with a foot that is broad and muscular, allowing for efficient locomotion across substrates. Sexual dimorphism is subtle, with females generally being slightly larger than males. Defensive adaptations include the ability to retract into its shell and a hardened operculum that seals the shell opening. Unique morphological features include a well-developed siphon for respiration and a radula adapted for predation, allowing it to scrape algae and other organic matter from surfaces.
Behavior & temperament
The Assassin Snail is primarily a solitary and territorial species, often found inhabiting the benthic zones of freshwater environments in Southeast Asia. It exhibits a predatory behavior, actively hunting down small invertebrates, particularly pest snails, which it consumes using its specialized radula. During breeding, C. helena is known to be ovoviviparous, with females giving birth to live young rather than laying eggs. This species tends to be less aggressive towards tank mates but can display territoriality when competing for resources, particularly in confined spaces.
Diet & feeding
In the wild, the Assassin Snail is an omnivore, primarily feeding on detritus, algae, and small invertebrates, including other snails. In captivity, it requires a varied diet that includes high-quality sinking pellets, blanched vegetables, and occasional protein sources such as frozen or live foods to thrive.
Behind the name
Clea (from Greek, meaning 'to clean'); helena (derived from the Latin name for the ancient city of Helena, reflecting its historical significance).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Assassin Snail?
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