Live forecasts update automatically; written guidance last reviewed 15 June 2026 by the National Report weather desk. Data from national met services via Open-Meteo.
If you’re considering dojo loaches for your aquarium or pond, expect a lively, social fish that thrives in cool, well-oxygenated water. Known as weather loaches for their sensitivity to pressure changes, they are popular but banned in parts of the UK, so always check local rules first.
How big do dojo loaches get?
Dojo loaches (weather loach) can reach up to 25–30 cm (10–12 inches) in captivity, though many stay around 20 cm. Their size depends on tank conditions, diet and genetics. Because they grow steadily over several years, it’s easy to underestimate their eventual adult size. If you’re buying dojo loaches for sale, plan for a full-grown fish from the start.
Are dojo loaches illegal in the UK?
Yes, in some areas. The weather loach is listed under the Invasive Alien Species (Enforcement and Permitting) Order 2019, meaning it is banned from sale, keeping or release in England and Wales without a licence. Scotland has similar restrictions. Before buying dojo loaches, check with your local authority or the government website. If you’re based near Birmingham or Liverpool, it’s sensible to verify rules via your local council – and keep an eye on water temperatures using our Birmingham weather page if you have an outdoor pond.
Can dojo loaches live with other fish?
Yes, they are peaceful and social. Good tank mates include goldfish, danios and other temperate species. Avoid aggressive or fin-nipping fish. They prefer groups of three or more, so consider the tank size carefully.
How do they predict the weather?
Dojo loaches become unusually active when barometric pressure drops before a storm. This behaviour has earned them the nickname “weather loach”. While not a precise forecast, it’s a fascinating trait for aquarium keepers.
Where can I find dojo loaches for sale?
Specialist fish stores and online breeders sometimes sell dojo loaches, but be aware of legal restrictions. Check that the seller is licensed if you live in a banned area. Always verify the species – there are several types of dojo loaches, including gold and wild-type colour forms.