At a glance the quick version
LiveAquaria lists a maximum of 1 in (about 2.5 cm) for banded trochus; wild members of the genus range from medium to large, but no species-level figure was found.
Looks how to spot one
Cone-shaped (top-shaped) shell
A neat, pyramid-like shell with a broad cone spire and a flat base, pale grey with maroon stripes in the banded form. The inside of the shell is lined with pearly nacre. The foot is black on top and off-white to tan underneath.12
Personality what they are like
Peaceful and harmless to fish, corals and other invertebrates. A steady grazer that keeps glass and rock surfaces clean.2
Daily activity how busy a day looks
Moves steadily over glass and rockwork, grazing as it goes.2
Grooming and care the hands-on bits
Rated easy. Keep water stable and offer dried seaweed if natural algae is scarce.2
Home where they are happiest
A marine reef aquarium with rock and glass surfaces to graze. LiveAquaria gives 72-78 °F (about 22-26 °C), pH 8.1-8.4, dKH 8-12 and specific gravity 1.023-1.025. No minimum tank size was given by the sources.2
Food basics what goes in the bowl
A herbivore that eats algae films, diatoms and cyanobacteria; it only nibbles lightly at longer hair algae.2
Company who they like around
Peaceful and often kept in groups as part of a clean-up crew.2
The story where it all began
Linnaeus set up the genus Trochus in 1758, borrowing a name first used by Guillaume Rondelet in 1558. The genus once held many unrelated shells and has since been trimmed down to a smaller group of true top shells.1
Fun facts for the dinner table
- 1
Unlike some look-alike snails, a trochus can flip itself back over when knocked onto its back.2
- 2
It often spawns in home aquariums, releasing eggs and sperm into the water, sometimes after a change in lighting or water.2
- 3
The thick pearly nacre inside top shells was once widely used to make mother-of-pearl buttons.1
- 4
The name Trochus was first used in 1558, two centuries before Linnaeus made it a formal genus.1
Recognised by the official bits
- Taxonomy (via Wikipedia)
- Genus Trochus Linnaeus, 1758 (family Trochidae). Aquarium snails are usually sold only to genus level; the big commercial 'trochus' shell, Tectus niloticus, now belongs to a different family.1
The care rhythm a typical week and year
A typical home-care rhythm for a Trochus Snail. A starting point, not a vet's advice.
- FeedingDepends on species, many feed from the light and the watervaries
- Salinity checkevery week
- Water testevery week
- Top-upTop up evaporation with fresh RO water, not salt waterevery day
- Water changeAbout 10 to 20% of the waterevery 2 weeks
- Light checkevery month
Owner questions the things everyone asks
How often should I feed my Trochus Snail?
Your Trochus Snail grazes on algae naturally, so you may not need to feed it often. If algae is scarce, offer dried seaweed a few times a week. Furry Diary's starting plan suggests feeding depends on the species, so watch your snail and adjust.2 Pet Wiki plan
What does a Trochus Snail eat, and what should it never eat?
It eats algae films, diatoms, and cyanobacteria, and only lightly nibbles hair algae. Avoid offering any meaty foods or artificial additives, as it is strictly a herbivore.2
How much space does a Trochus Snail need?
A Trochus Snail needs a marine reef aquarium with plenty of rock and glass surfaces to graze. The exact tank size varies, so ask a good breeder or reef expert for guidance.
What temperature, light or water does a Trochus Snail need?
Keep water at 72-78°F, pH 8.1-8.4, alkalinity 8-12 dKH, and specific gravity 1.023-1.025. Provide standard reef lighting; Furry Diary suggests checking lights monthly.2 Pet Wiki plan
How often should I clean a Trochus Snail's home?
Clean the tank with regular water changes of 10-20% every two weeks, and top up evaporation daily with fresh RO water. Test water weekly to keep conditions stable. Pet Wiki plan
Can a Trochus Snail live with others?
Yes, Trochus Snails are peaceful and can live with fish, corals, and other invertebrates. They are often kept in groups as a clean-up crew.2
How long does a Trochus Snail live?
Lifespan varies depending on care and environment. For a more specific estimate, ask a good breeder or an exotic-pet vet.
Can I handle a Trochus Snail?
It's best not to handle them often, as they are delicate. If you must, do so gently and return them to water quickly.
Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Pet Wiki's own starting care plan. A friendly guide, not a vet's advice.
Where this comes from
Every fact on this page has a numbered source. Spotted an error? support@petwiki.app.
- Trochus (Wikipedia) en.wikipedia.orgused for genus description, taxonomy, history, nacre, fun facts
- Banded Trochus Snail, LiveAquaria liveaquaria.comused for origin, size, colour, care, water parameters, diet, behaviour
Checked 2026-09-30. Text is written in our own words from these sources.