Max Size: 2cm

Assassin Snail (Clea Helena)

The Assassin snail is relatively hardy, but it naturally requires good water quality. They are not challenging to take care of as long as the water conditions are right, and they have plenty of food.

They are least active during mid-day, and aquatic plants are perfectly safe from these opportunistic carnivores, and they are handy to have to keep other snail populations down.

Assassin Snails are also very attractive, the ribbed conical yellow-cream shell is complemented with dark brown spirals, and dark speckles throughout and the body is a greyish green in colour.


Assassin Snail
Assassin Snail
Assassin Snail
Assassin Snail
Assassin Snail
Assassin Snail
Assassin Snail
Assassin Snail
Assassin Snail
Quick Facts
Scientific NameClea Helena
Other NamesBumblebee Snail
Classification Gastropoda
Order Neogastropoda
OriginsIndonesia, Malaysia, Thailand
Aquarium LevelBottom
DifficultyBeginner - Intermediate
Best kept asGroups 6+
Lifespan2 - 5 years
Water Parameters
Water TypeFreshwater
PH7.2 - 8.0
GH10 - 25
72 - 81℉
22.2 - 27.2℃


Assassin Snails will eat almost anything that they can scavenge.

They will consume other snails, mosquito larvae, bloodworm and brine shrimp as well as sinking pellets, flakes, granules, meaty debris and dead fish.

If there is a giant snail population in their tank, then there is often no need to feed them at all.

Sexual Dimorphism

Assassin snails have determined females and males, and are not hermaphroditic like other snails. It is almost impossible to sex these snails, but it is thought that the females may be slightly larger than the males.

Frequently asked questions

Do Assassin snails eat other Assassin snails?

No, as a rule, Assassin snails do not predate on other assassin snails, even when there are no other snails in the aquarium for them to consume.

Other Snails of interest

Apple Snail(Pomacea bridgesii, Pomacea canaliculata, Pomacea diffusa, Pomacea haustrum, Pomacea paludosa, Pomacea maculata)
Giant Colombian Ramshorn Snail(Marisa cornuarietis)
Malaysian Trumpet Snail(Melanoides Tuberculata)
Pond Snail(Lymnaea stagnalis)
Rabbit Snail(Tylomelania gemmifera)
Ramshorn Snail(Planorbella duryi)
View all Snails
Date Added: 25/08/2020 - Updated: 08/02/2022 13:53:35