Clea helena is one of the most sought-after species in the aquarium business as it has the capability to hunt down pest snails; thus, helping solve the snail infestation concerns in fish tanks. Except for this, they are a peaceful community tank resident. Keep reading to know more about the assassin snail.        Appearance Their shells are conical and are prominent because of their yellow and dark brown stripes – adding a splash of color inside the fish tank. Unlike other species