Do Cerith snails burrow in the sand?

Yes, they are excellent sand-sifters. They often bury themselves in the substrate during the day to rest and emerge at night or when food is introduced, which helps aerate the sand bed.

Why is my Cerith snail not moving?

It is completely normal for them to remain stationary or buried for several days at a time. Pick them up gently and smell them; if there is a foul odour, the snail has perished. If not, it is likely just resting.

Can Cerith snails flip themselves over?

Generally, yes. Their elongated, conical shell gives them the leverage needed to extend their foot and right themselves, provided they are on a textured surface like sand or rock.

Will Cerith snails eat hair algae?

They primarily consume diatoms, detritus, and film algae. While they might graze on very young hair algae, they are not an effective solution for full-blown, mature hair algae outbreaks.

How many Cerith snails should I keep?

A common recommendation is roughly one Cerith snail for every 10 to 15 litres of water, depending on the bioload and amount of algae present in the aquarium.

MarineMarineBeginner

Cerith Snail

Cerithium spp.

The Cerith Snail is an invaluable, peaceful member of the marine cleanup crew, prized for its ability to consume detritus, diatoms, and film algae while aerating the sand bed.

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Ideal Conditions

Temperature: 22 – 27 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.023 – 1.026 SG
Adult size: 1 – 4 cm
Nano tank: 20 litres+
Lifespan: 1 – 3 years
Diet: Herbivore/Detritivore
Water flow: Moderate
Preferred setup: Sandy substrate is highly recommended for burrowing.

About the Cerith Snail

Cerith snails belong to a large family of marine gastropods characterised by their elongated, spiralling shells. In the home aquarium, they serve as one of the most versatile members of the cleanup crew. Unlike some specialised snails, Ceriths are omnivorous scavengers that will happily graze on diatoms, cyanobacteria, film algae, and uneaten meaty foods. Their habit of burrowing into the substrate during the day helps to keep the sand bed oxygenated and prevents the buildup of toxic gases.

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Where Cerith Snail comes from

Native range

Caribbean Sea, Indo-Pacific, Gulf of California

Countries / regions

United States, Mexico, Indonesia, Australia

Habitat

Shallow coastal waters, reef flats, seagrass beds, and sandy tidal zones.

The aquarium trade encompasses several distinct species under the Cerithium genus collected globally.

Similar species

Nassarius Snail
Nassarius spp.
Trochus Snail
Trochus spp.
Nerite Snail
Nerita spp.

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Ocellaris Clownfish
Amphiprion ocellaris
Peaceful fish that completely ignore bottom-dwelling snails.
Great
Nassarius Snail
Nassarius spp.
Excellent cleanup crew partners; Nassarius handle meaty detritus while Ceriths tackle algae.
Great
Blue-legged Hermit Crab
Clibanarius tricolor
Hermit crabs may kill Cerith snails to steal their elongated shells if empty shells are not provided.
Compatible with caution
Dogface Puffer
Arothron nigropunctatus
Large puffers have strong beaks designed specifically to crush and eat hard-shelled invertebrates.
Not recommended
Sixline Wrasse
Pseudocheilinus hexataenia
While generally reef safe, some wrasses may opportunistically pick at smaller snails.
Compatible with caution

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