Back to atlas
InvertebrateMarineEasy

Encyclopaedia

Obvelatus Nassarius Snail

Nassarius obvelatus

A small and highly active marine burrowing gastropod, ideal for aerating sandy substrates and scavenging organic detritus and leftover fish food.

Family
Nassariidae
Origin
Indo-Pacifico tropicale
Origin
Tropical oceans and reefsSouth and Southeast AsiaAustralia, New Guinea, and Oceania
Tank use
Used in 0 tanks

Share

Species challenges
Water Temperature

22 °C - 28 °C

pH Value

8.1 - 8.4

Water type

Marine

Ecological role

Fossore/Spazzino

Copper

Alta

Species description

Geographical Origin and Habitat: Widely distributed in the tropical Indo-Pacific, including the coral reefs of Indonesia, the Philippines, northern Australia, and Pacific islands. Inhabits shallow sand flats.

Taxonomy: Member of the family Nassariidae. Features a small, thick-walled, oval shell with a pointed spire and distinct longitudinal ridges, measuring about 1.5-2 cm in length. Equipped with a long siphon. Grows to 1.8 cm.

Social Behavior: Peaceful, harmless, and very active. Spends almost all its time buried in the sand with only its snorkel-like siphon exposed. Emerges rapidly when it smells food in the water column.

Coloration and Sexual Dimorphism: Shell color has a white, cream, or light beige base, often marked with light brown or grayish mottling on the ridges. Fleshy body is speckled white and grey. No visible sexual dimorphism.

Care, breeding and tankmates

Tank Setup: Must be provided with a fine sand bed at least 1-2 inches deep to allow burrowing behavior. Suitable for nano reefs of 5 gallons or larger. Does not require rocks for climbing.

Diet and Feeding: Carnivorous detritivore and scavenger. Does not consume algae or corals. Feeds on detritus inside the sand bed, decaying organic matter, and meaty frozen foods or pellets.

Water Quality: Stable reef parameters. Salinity SG 1.020-1.025, pH 8.1-8.4, temperature 22-28°C. Highly sensitive to copper treatments and sudden osmotic shocks.

Compatibility and Tankmates: 100% reef-safe. Excellent sand aerator and stirrer. Compatible with peaceful reef fish. May be targeted by hermit crabs seeking replacement shells.

Aquarium Breeding: Lays small egg capsules on glass or rocks. Pelagic larval stages are fragile and rarely survive standard home aquarium filtration systems.

Risks and Diseases: Starvation in sterile tanks or setups lacking a sandy substrate. Low calcium or alkalinity leading to shell degradation. Highly sensitive to copper treatments.

Invertebrate profile

Type
Gasteropode marino
Diet
Carnivoro/Spazzino
Ecological role
Fossore/Spazzino
Minimum group
1
Adult size
1.8 cm
GH
n/a
KH
8 dKH - 12 dKH
TDS
n/a
Copper
Alta
Shock sensitivity
Media
Calcium and minerals
Fornire livelli adeguati di calcio e durezza carbonatica KH per mantenere la conchiglia spessa e sana.
Molting
Non muta (è un gasteropode), la conchiglia cresce gradualmente per deposizione di strati calcarei da parte del mantello.
Reproduction
Depone capsule ovariche sulle pareti, ma lo stadio planctonico larvale difficilmente sopravvive ai sistemi di filtraggio.
Compatibility & tankmates
Assolutamente reef-safe. Molto utile per scavare e arieggiare il fondo sabbioso dell'acquario.

Ecological Estimates & Biological Models

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Related species

Other recommended species with similar care requirements and water parameters.

Last updated: 06/13/2026