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SnailbeginnerSaltwater

Stomatella Snail

Stomatella varia

AnimaliaMolluscaGastropodaTrochidae

📍 Indo-Pacific reef rock

Ask Finn

Fast-moving, flat-shelled snail that looks more like a slug. Reproduces readily in reef tanks, forming beneficial colonies that graze film algae and coralline. Fish generally ignore them; a great hitchhiker species.

Size1"
Min Tank10g
peaceful
Zoneall

Care Guide

Diet

Stomatella snails are herbivorous grazers that feed primarily on film algae, diatoms, and coralline algae. They require no supplemental feeding in established reef tanks with adequate algae growth, as they continuously graze on rock surfaces and substrate. In newer or heavily cleaned tanks, supplement with dried seaweed sheets or algae-based pellets to prevent starvation.

Behavior

These snails are highly active, fast-moving grazers that spend most of their time crawling across rocks and substrate in search of food. They are completely peaceful and nocturnal, becoming most active during evening hours and at night. They reproduce readily in stable reef environments, often forming beneficial colonies that help control nuisance algae without any intervention needed.

Breeding

Stomatella snails breed prolifically in captivity under stable conditions, with larvae developing in the water column and settling on surfaces. No special breeding setup is required; they simply reproduce naturally in established tanks with adequate food and stable parameters. Populations can grow rapidly, but they rarely become problematic as they self-regulate based on available food resources.

Common Diseases

Shell Erosion

Symptoms

Pitting, roughness, or dissolution of shell surface; reduced shell integrity

Treatment

Maintain stable pH (8.1-8.4) and alkalinity; ensure adequate calcium supplementation in reef tanks to support shell health

Parasitic Infection

Symptoms

Lethargy, reduced grazing activity, visible parasites on shell or foot

Treatment

Quarantine affected snails; perform water changes; avoid copper-based treatments as snails are sensitive; maintain water quality

Starvation

Symptoms

Inactivity, withdrawal into shell, visible weight loss, death in newly established tanks

Treatment

Ensure adequate algae growth or supplement with algae-based foods; avoid over-cleaning rocks; maintain stable, mature tank conditions

Osmotic Stress

Symptoms

Foot retraction, shell gaping, inability to adhere to surfaces

Treatment

Maintain stable salinity (1.023-1.025 SG) and temperature; acclimate slowly if introducing to new systems; avoid sudden parameter changes

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Quick Facts

pH
8.1–8.4
diet
herbivore — film algae, diatoms
maxSize
1 inch
minTankSize
5 gallons
temperature
72–82°F (22–28°C)

Temperature

72–82°F

22–28°C

Stats

Community tips0
Kept by0 hobbyists