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 Furry Diary remembers it for you
A typical home-care rhythm for a Trochus Snail. It is our own starting plan, not a vet's advice, and you can change every line in the app.
- 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
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Where this comes from
Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at [email protected] and we will fix it.
- 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.