Assassin Snail - 2cm

Species Profile

• Scientific Name: Clea helena
• Common Name: Assassin Snail 
• Adult Size: 0.5 – 1 inch (1.3 – 2.5 cm)
• Life Expectancy: 1 – 2 years (can live slightly longer in ideal conditions)
• Habitat: Found in freshwater and brackish coastal streams and rivers across Southeast Asia. Prefers shallow, slow-moving waters with algae-covered rocks and vegetation.

Tank Requirements

• Minimum Tank Size: 5 gallons (19 liters)
• Ideal Temperature: 72°F – 82°F (22°C – 28°C)
• pH Range: 7.0 – 8.5
• Water Hardness: Moderately hard to hard (8 – 18 dGH)
• Temperament: Peaceful and non-aggressive; safe with all community tank mates. Excellent algae grazers and tank cleaners.

Diet & Nutrition

• Omnivorous: Yes. Primarily feeds on algae, biofilm, and decaying plant matter. Will also accept algae wafers, blanched vegetables (e.g., spinach, zucchini), and sinking pellets.

Appearance

• Coloration: Shells come in a range of colors and patterns—typically yellow, black, and brown arranged in bands, swirls, or blotches.Shell Structure: Recognized by
• small horn-like projections on the shell, giving it a distinctive spiked appearance.

Distinctive Features

• Small, horned shell gives them a unique and ornamental appearance
• Extremely effective at cleaning algae off glass, rocks, and plants
• Does not reproduce in freshwater—eggs may be laid but won't hatch, so population won't explode
• Tolerant of a wide range of tank conditions but requires stable water parameters
• Popular in planted tanks and nano aquascapes due to small size and aesthetics