1 kinds · tap one for a closer look
Peaceful and nocturnal; best in a cool, well-oxygenated tank with sand and stones.
This one is best kept on its own, or with its own kind.
Peaceful and nocturnal; best in a cool, well-oxygenated tank with sand and stones.
Sinking pellets, frozen bloodworm, small live foods.
Tap a food to see what it is.
Common problems. Tap one to see the signs. This is a guide, not a diagnosis.
Seasonal spawner · Hard
Spawns over gravel, sand or plants, releasing eggs into open water near the surface; the eggs drift, stick to the bottom and are often covered by sand or detritus. Females may spawn daily for a short period, once a year in poor streams or several times a season in rich ones.
Group of adults in spring.
Cool stream-type tank with gravel and current.
Cold winter and rising spring temperature.
Hundreds of eggs scattered on gravel.
Fry eat infusoria then brine shrimp.
A European stream loach with three pairs of barbels that lives on gravel and stones in flowing streams and rivers. It is sensitive to pollution and low oxygen, so its presence signals good water quality.
Linnaeus described this loach in 1758 as Cobitis barbatula. It lives under stones in clean streams across much of Europe. It is sometimes kept by coldwater and native-fish enthusiasts.
First described by Carl Linnaeus in 1758. Named for 'barbatula' means 'little beard', for its barbels.
12 facts checked with sources
IMPORTANT 2025 change: Calegari et al. (2025) fixed a neotype from the Lez River, southern France, so B. barbatula in the strict sense is now a southern French/NW Spanish fish. Stone loaches of the middle/upper Rhine and upper Danube are the new B. fluvicola (B. ommata is a Swiss lake species). The name for British and northern European stone loaches was not stated in the sources checked; treat 'B. barbatula' for those fish as provisional (B. aff. barbatula).
Eschmeyer's Catalog of Fishes (online, updated 21 Sep 2026): Barbatula barbatula · Calegari et al. (2025) Two new species of stone loaches of the genus Barbatula from Europe with a neotype designation of B. barbatula. J. Fish Biol. 107(4): 1364-1397 (BioNames record) · Eschmeyer's Catalog of Fishes (online, updated 21 Sep 2026): Barbatula fluvicolaLegacy has no family. Not a cobitid: no spine below the eye.
FishBase: Barbatula barbatula summary · Eschmeyer's Catalog of Fishes (online, updated 21 Sep 2026): Barbatula barbatulasize-pick: 12 cm SL is FishBase's common length; the 21 cm TL maximum (with a 200 g weight) is a single record far above typical adults. No aquarium figure found. Legacy 10 cm is a little low.
FishBase: Barbatula barbatula summaryFishBase gives only an upper limit of 18 °C; legacy upper 20 °C is above it. Lower limit not given (coldwater stream fish).
FishBase: Barbatula barbatula summaryFishBase.
FishBase: Barbatula barbatula summaryFishBase dH (taken as °dGH).
FishBase: Barbatula barbatula summaryMaximum reported age 7 years; legacy 5-8 years slightly exceeds it.
FishBase: Barbatula barbatula summaryNo source rates care difficulty. Its need for clean, well-oxygenated cool water argues against the legacy 'easy' rating.
FishBase: Barbatula barbatula summaryFishBase still shows the broad pre-2025 range. Habitat: flowing streams and rivers over gravel and stone, also sandy canals and lake shores.
Eschmeyer's Catalog of Fishes (online, updated 21 Sep 2026): Barbatula barbatula · FishBase: Barbatula barbatula summary · Eschmeyer's Catalog of Fishes (online, updated 21 Sep 2026): Barbatula fluvicolaLegacy 'spawns in spring over gravel' is partly supported (gravel); season not stated in the source. No aquarium breeding account found.
FishBase: Barbatula barbatula summaryLegacy 'often collected for coldwater tanks and ponds' is unsourced (FishBase lists it for public aquariums and occasional bait); wild collection may need permission locally.
FishBase: Barbatula barbatula summary