Back to atlas
InvertebrateMarineEasy

Encyclopaedia

Pyramid Top Snail

Tectus pyramis

A large herbivorous marine gastropod with a distinctive, relatively smooth pyramidal shell, highly valued as an outstanding algae grazer.

Family
Tegulidae
Origin
Indo-Pacifico tropicale
Origin
Cosmopolitan or introducedExtra-Amazon South AmericaAfrica and MadagascarEast AsiaAustralia, New Guinea, and OceaniaTropical oceans and reefs
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

Squadra di pulizia dell'acquario (CUC)

Copper

Alta

Species description

Geographical Origin and Habitat: Widely distributed throughout the tropical Indo-Pacific, from East Africa and the Red Sea to southern Japan, Australia, and Polynesia. Inhabits shallow rocky reefs and reef crests.

Taxonomy: Member of the family Tegulidae. Distinct from Tectus niloticus by its smoother, more regularly conical, pyramid-shaped shell, measuring 6-9 cm in base diameter as an adult. Grows to 8 cm.

Social Behavior: Peaceful, hardworking, and active primarily at night. Constantly climbs rocks and glass surfaces scraping algae off. Possesses the valuable ability to easily right itself.

Coloration and Sexual Dimorphism: Shell color has a grayish-green, olive, beige, or pale brownish tone, often obscured by pink coralline algae growths. Interior is highly pearly. No visible sexual dimorphism.

Care, breeding and tankmates

Tank Setup: Suitable for reef aquariums of 30 gallons or larger. Requires stable live rock structures with ample surface area for grazing. Secure loose rockwork to prevent displacement.

Diet and Feeding: Strictly herbivorous. Consumes green hair algae, diatoms, cyanobacteria, and film algae. Supplement with dried seaweed (nori sheets) if natural algae is depleted.

Water Quality: Stable reef parameters. Salinity SG 1.021-1.025, pH 8.1-8.4, temperature 22-28°C. Highly sensitive to copper treatments and sudden osmotic shocks.

Compatibility and Tankmates: 100% reef-safe. Perfect cleanup crew snail. Compatible with peaceful reef fish and corals. May occasionally be targeted by large hermit crabs.

Aquarium Breeding: Can reproduce spontaneously in home aquariums through broadcast spawning. Fertilized eggs develop into larvae that settle quickly on rocky substrates.

Risks and Diseases: Starvation in overly clean aquariums. Low calcium or alkalinity levels preventing proper shell growth. Highly sensitive to copper treatments.

Invertebrate profile

Type
Gasteropode marino
Diet
Alghivoro
Ecological role
Squadra di pulizia dell'acquario (CUC)
Minimum group
1
Adult size
8 cm
GH
n/a
KH
8 dKH - 12 dKH
TDS
n/a
Copper
Alta
Shock sensitivity
Alta
Calcium and minerals
Alti. Necessita di livelli costanti di calcio, magnesio e durezza KH per garantire il corretto sviluppo e l'ispessimento della conchiglia.
Molting
Non muta (è un gasteropode), la conchiglia cresce gradualmente per deposizione di strati calcarei da parte del mantello.
Reproduction
Si riproduce abbastanza comunemente tramite rilascio di gameti in acquario. Le larve si insediano rapidamente sul fondo roccioso.
Compatibility & tankmates
Assolutamente pacifico. Noto per la capacità di raddrizzarsi da solo in caso di caduta rovesciata, riducendo la predazione.

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