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SnailbeginnerSaltwater

Margarita Snail

Margarites pupillus

AnimaliaMolluscaGastropodaTrochidae

📍 Eastern Pacific — Alaska to Baja California

Ask Finn

Small, cold-water snail — an exceptional algae grazer often used in reef tanks as clean-up crew. Prefers cooler temperatures so it's ideal for FOWLR tanks or tanks below 74°F. Peaceful and prolific.

Size1"
Min Tank10g
peaceful
Zoneall

Care Guide

Diet

Margarita snails are herbivorous grazers that primarily consume film algae, diatoms, and coralline algae found on rocks and tank surfaces. They do not require supplemental feeding in established tanks with adequate algae growth, but in newer or heavily cleaned tanks, offer dried seaweed sheets or algae wafers 2-3 times weekly. They will not consume macroalgae or damage healthy corals.

Behavior

These small, peaceful snails are active grazers that spend most of their time slowly moving across surfaces in search of food. They are solitary and non-aggressive toward all tank inhabitants, making them ideal cleanup crew members. They are most active during cooler hours and may retreat into their shells during warmer periods, which is normal behavior.

Breeding

Breeding Margarita snails in captivity is extremely rare and poorly documented. They are broadcast spawners that require specific environmental cues and larval development stages difficult to replicate in home aquariums. Captive-bred specimens are virtually unavailable; wild-caught individuals are the standard in the hobby.

Common Diseases

Shell Erosion

Symptoms

Pitting, chalky appearance, or thinning of shell; reduced activity

Treatment

Ensure adequate calcium supplementation and stable pH (8.1-8.4); perform regular water changes to maintain water quality and mineral content

Parasitic Infection

Symptoms

Excessive mucus production, inability to retract into shell, lethargy, or visible parasites on body

Treatment

Quarantine affected snail; perform freshwater dips (brief, 1-2 minutes) or use copper-free treatments; improve water quality and reduce stressors

Starvation

Symptoms

Visible weight loss, reduced activity, failure to graze, or empty shell appearance

Treatment

Increase algae growth by reducing tank cleaning frequency or adding algae wafers; ensure adequate lighting to promote diatom and film algae growth

Temperature Stress

Symptoms

Lethargy, reduced grazing activity, or prolonged shell retraction in tanks warmer than 18°C

Treatment

Maintain water temperature between 10-18°C using a chiller if necessary; avoid rapid temperature fluctuations; ensure adequate water circulation

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Quick Facts

pH
8.1–8.4
diet
herbivore — film algae, diatoms, coralline
maxSize
0.75 inches
minTankSize
10 gallons
temperature
50–64°F (10–18°C)

Temperature

50–64°F

10–18°C

Stats

Community tips0
Kept by0 hobbyists