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SnailbeginnerSaltwater

Cerith Snail

Cerithium sp.

AnimaliaMolluscaGastropodaCerithiidae

📍 Indo-Pacific & Caribbean Reefs

Ask Finn

Small, elongated shell snail that works the sand bed, glass, and rocks. Excellent algae grazer and detritivore. Reproduces readily and stays small.

Size1"
Min Tank10g
peaceful
Zoneall

Care Guide

Diet

Cerith snails are primarily detritivores and algae grazers that feed continuously on biofilm, decaying matter, and algae on sand, glass, and rockwork. They require no supplemental feeding in established tanks with adequate algae growth, but can be offered blanched vegetables or sinking pellets if algae becomes scarce. Feed sparingly—overfeeding degrades water quality and encourages excess detritus accumulation.

Behavior

Cerith snails are nocturnal and spend most of their time burrowing through sand and grazing on surfaces, making them excellent for substrate maintenance. They are peaceful, solitary snails that rarely interact with other inhabitants and can reproduce prolifically in stable conditions. They are most active during low-light hours and may retreat into their shells during bright periods.

Breeding

Cerith snails breed readily in captivity without special conditions, and populations can grow rapidly in established tanks. Females lay small egg capsules on surfaces, which hatch into planktonic larvae before settling. Population control may be necessary in mature systems, as they can become abundant and compete for food resources.

Common Diseases

Shell Erosion

Symptoms

Pitting, thinning, or deterioration of shell surface; exposed soft tissue

Treatment

Increase calcium supplementation and maintain stable pH 8.1–8.4; improve water quality and reduce acidic conditions

Parasitic Infection

Symptoms

Lethargy, reduced feeding, visible parasites on shell or body, mucus coating

Treatment

Quarantine affected snails; perform water changes; use copper-free treatments if necessary; improve tank hygiene

Starvation

Symptoms

Withdrawn behavior, failure to emerge from shell, visible weight loss

Treatment

Ensure adequate algae growth through proper lighting; supplement with algae wafers or blanched vegetables if needed

Sudden Death Syndrome

Symptoms

Rapid decline, gaping shell, death within hours to days

Treatment

Check water parameters immediately (pH, salinity, temperature); perform partial water change; avoid sudden environmental changes

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Quick Facts

pH
8.1–8.4
diet
algae/detritus
salinity
1.023–1.025 SG
minTankSize
10 gallons
temperature
75–81°F (24–27°C)

Temperature

75–81°F

24–27°C

Stats

Community tips0
Kept by0 hobbyists