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Nerite Snail
Neritina natalensis
Animalia›Mollusca›Gastropoda›Neritidae
📍 Tropical regions worldwide
Nerite snails are among the best algae-eating invertebrates available, consuming green spot algae, diatoms, and film algae from glass, rocks, and plant leaves. They cannot reproduce in freshwater, so populations remain controlled. They may attempt to escape, so a tight-fitting lid is advisable.
Care Guide
Diet
Nerite snails are strict herbivores that primarily consume algae films, green spot algae, and diatoms from glass, rocks, and plant leaves. Supplement their diet with blanched vegetables such as zucchini, spinach, or cucumber 2-3 times weekly if algae growth is insufficient. They do not require commercial food but will benefit from algae wafers during periods of low natural algae availability.
Behavior
Nerite snails are peaceful, slow-moving grazers that spend most of their time methodically cleaning surfaces throughout the tank. They are primarily nocturnal and may hide during the day, becoming more active in dimmer lighting conditions. These snails are known escape artists and will attempt to leave the tank if conditions deteriorate, so a tight-fitting lid is essential.
Breeding
Nerite snails cannot reproduce in freshwater aquariums, making them ideal for population control in community tanks. Breeding requires brackish water conditions that are impractical for most freshwater setups. This inability to breed in captivity is actually beneficial, as it prevents overpopulation issues common with other snail species.
Tank Mates
Both are peaceful algae-eaters with identical water parameter requirements and non-aggressive temperaments
Small, peaceful fish that occupy different tank zones and have compatible tropical water needs
Peaceful invertebrates with similar water requirements; may compete for algae but coexist well
Peaceful, slow-moving fish that won't prey on snails and thrive in identical water conditions
Bottom-dwelling catfish with peaceful temperament and matching water parameters; complementary feeding habits
Common Diseases
Shell Erosion
Pitting, thinning, or deterioration of the shell surface; visible damage to shell structure
Increase water hardness (6-12 dGH minimum) through calcium supplementation or crushed coral substrate; ensure pH remains 7.0-8.0 for proper shell mineralization
Parasitic Infection
Lethargy, withdrawal into shell for extended periods, visible parasites on body or shell
Perform 25% water changes weekly; quarantine affected snails; avoid copper-based treatments which are toxic to snails
Bacterial Infection
Foul odor from snail, visible lesions on foot or body, mucus buildup, inability to retract into shell
Improve water quality through frequent partial water changes; maintain ammonia at 0 ppm and nitrate below 20 ppm; remove uneaten food promptly
Starvation
Reduced activity, visible weight loss, snail remains hidden for days, shell becomes dull
Ensure adequate algae growth through moderate lighting; supplement with blanched vegetables; verify tank has sufficient biofilm and algae coverage
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Varieties
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Tanks keeping this 🐟
Kept by 2 hobbyistsCommunity tanks featuring Nerite Snail.
Quick Facts
- diet
- Herbivore – algae film, green spot algae, blanched vegetables
- breeding
- Does not reproduce in freshwater
- lifespan
- 1–2 years
- max size
- 2.5 cm (1 in)
- tank size
- 5 gallons minimum
- temperament
- Peaceful
Water it likes
- ph
- 7.0–8.0
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 6–12 dGH (hard water essential for shell health)
- temperature
- 72–79°F (22–26°C)