Pyramid Top Snail

Tectus fenestratus

Also known as Tectus Snail, Fenestrate Top Shell, Grazer Shell, False Trochus Snail, Latticed Top Shell

SaltwaterSnail

Care at a glance

Temperature
75–81°F (24–27°C)
pH
8.1–8.4
Adult size
2 in (5 cm)
Minimum tank
11 gal (40 L)
Temperament
Peaceful
Social behavior
Social
Swim level
Bottom
Difficulty
Beginner
Breeding
No record
Rarity
Common
Reef safe
Reef safe
Origin
Indo-Pacific, grazing rock and rubble on shallow reef flats.
Family
Tegulidae

Overview

Add one or a few to a tank of 40 litres or more at 24 to 27 C and pH 8.1 to 8.4 with mature rock and algae to graze. It eats diatoms, film algae, hair algae, and some cyanobacteria off hard surfaces and is completely reef safe. In a very clean tank it can run short of food, so offer dried algae if the rock looks bare.

In the wild

The pyramid top snail has a tall, cone-shaped shell with a flat base, often patched with algae that helps it blend into the rock. It is a tough, no-nonsense grazer that works the rock, glass, and sand for algae. The shell reaches around 5 cm at full size.

Good to know

Tectus fenestratus belongs to the top shell family Tegulidae and is closely related to the trochus snails sold for the same cleanup job. It grazes mostly at night and can usually right itself if it tips over, unlike many turbo snails.

Did you know

Unlike many turbo snails, which can die stranded on their backs, it can usually flip itself upright if it lands on its shell.

Where to buy

Some links may not be the exact species or variety.

…or ask your local fish store.

Appears in

Snails · Saltwater clean-up crew · Marine inverts

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