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Assassin snail (Anentome helena)
Photo: RSX · CC BY-SA 3.0 via Wikimedia Commons

Assassin snail

Anentome helena · Nassariidae

Also known as Bumblebee snail

Beginner

Hunts and eats pest snails; the standard biological answer to a bladder snail plague.

In short: An assassin snail needs at least 40 L (11 US gal), water at 21–28 °C (70–82 °F) and pH 7–8. It is semi-aggressive, best kept in groups of 3 or more, and rated beginner to keep.

Updated

Minimum tank
40 L (11 US gal)
Temperature
21–28 °C (70–82 °F)
pH
7–8
Adult size
2 cm (0.8 in)
Group size
3+

Care requirements

Minimum tank volume
40 L (11 US gal)
Temperature
21–28 °C (70–82 °F)
pH
7–8
Hardness
6–20 dGH
Lifespan
2–3 years
Diet
Carnivore — pest snails, frozen bloodworm, sinking protein food.
Care level
Beginner

Origin & habitat

Native region
Southeast Asia
Water type
Freshwater
Biotope
Sandy, slow-moving streams
Natural conditions
Sand to burrow in; hard water for shell health.

Behaviour & stocking

Temperament
Semi-aggressive
Minimum group
3 fish
Swims
Bottom
Good tank mates
Community fish
Corydoras
Avoid
Ornamental snails
Shrimp fry
Copper medication

Breeding & difficulty

Breeding difficulty
Intermediate
Sexing
Not visually sexable.
Notes
Lays single square eggs; multiplies slowly.
Common ailments
Shell erosion
Starvation once pest snails are gone
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