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Misgurnus anguillicaudatus - Oriental Weather LoachMagyarul / Hungarian
Misgurnus anguillicaudatus - Oriental Weather LoachMisgurnus anguillicaudatus - Oriental Weather LoachMisgurnus anguillicaudatus - Oriental Weather LoachMisgurnus anguillicaudatus - Oriental Weather LoachMisgurnus anguillicaudatus - Oriental Weather LoachMisgurnus anguillicaudatus - Oriental Weather Loach
  • Scientific name: Misgurnus anguillicaudatus
  • Synonyms: Cobitis anguillicaudata (Cantor; 1842), Misgurnus fossilis anguillicaudatus (Cantor, 1842), Misgurnus lividus (Sauvage & Dabry de Thiersant, 1874), Nemacheilus lividus (Sauvage & Dabry de Thiersant, 1874), Misgurnis crossochilus (Sauvage, 1878), Ussuria lepocephala (Nikolskii, 1903), Misgurnus mizolepis grangeri (Nichols, 1925), Misgurnus mohoity leopardus (Nichols, 1925), Misgurnus mohoity yunnan (Nichols, 1925), Misgurnus punctatus (Oshima, 1926), Misgurnus mizolepis punctatus (Oshima, 1926), Misgurnus mizolepis unicolor (Lin, 1932), Misgurnus elongatus (Kimura, 1934), Misgurnus mizolepis elongatus (Kimura, 1934), Pond loach, Dojo loach, Japanese weather loach
  • Common name: Oriental Weather Loach
  • Group: Loaches
  • Distribution: Asia; native to Siberia, China, Korea, Japan, North Vietnam; it has been introduced in several countries in Europe (Germany, Italy, Spain) and in North America, Australia and Hawaii as an aquarium fish or live bait for anglers.
  • Size: 20-30 cm
  • Biotope: Mostly found in slow-flowing, muddy bottomed, shallow rivers near the bottom, but it may occur in swamps and rice fields too. These waters are often heavily-vegetated or littered with submerged roots, branches and leaf litter.
  • Social behavior: A peaceful, but active nocturnal fish, however they may prey small fish or fry. They can be kept with other cold water species like goldfish. They can become quite tame, often feeding from their owner's hand.
  • Diet: Omnivorous; it feeds on insect larvae and small crustaceans in nature, but in the aquarium it can be fed with live and frozen foods, or quality dried foods.
  • Breeding: It may occur in aquarium, but very rarely.
  • Tank: Minimum 200 litres
  • Population: 3-4 fish for 300 litres
  • Decoration: Use sandy bottom, as the fish like to burry itself into the substrate. Choose aquarium plants that endure cooler waters. The lighting shouldn't be bright. Water-worn rocks and driftwood branches can be added to the tank to form plenty of hiding places where the fish can rest during daytime. The tank should be covered as the fish may jump out.
  • Temperature: 5-25 °C
  • pH: 6.0-8.0
  • Hardness: 1.0-12.0 dGH
  • Lifespan: 7-10 years
Description: Oriental Weather Loach is a foodfish in its original habitat, and this may account for the wide distribution in Asia. This is a coldwater fish, but is so highly adaptable that have succeeded in colonizing parts of many warmer countries in different continents. Its high reproductive potential have made it a cause for concern to conservation scientists although as yet there remains no proof of it exerting a negative effect on native fishes in countries outside its natural range.

The body of the fish is eel-like with a small mouth. They can vary in color from yellow to light brown. Their patterns can also vary, some of them have greenish-brown spots on their body creating a marbling pattern, some of them are plain without any pattern. A "golden" variety is available with dark eyes, plus very occasionally true albinos are seen. They have are five pairs of barbels around the mouth. The common name is derived from a reported sensitivity to changes in barometric pressure which cause it to become more active, therefore in China they were kept in containers as weather predictors. Historically this is may be one of the longest kept species of fish. This loach has a special ability to swallow atmospheric air and pass it through the gut, extracting oxygen internally, so it can survive poor conditions, it has been reported that they can live up to three days out of water. Its close relative the European weather loach (Misgurnus fossilis) has the same ability to forecast weather changes due to its activity patterns changing when air pressure rises or falls.

Mature females have fuller body particularly when full of eggs, and are a little larger than males, while in mature males the pectoral fins are enlarged with a thickened second ray and also exhibit horizontal "swellings" on the body behind the dorsal fin which are clearly visible when the fish are viewed from above.
There are no reports about their aquarium breeding, but in nature, the fish spawn during the wet season during flooding, where the male wraps himself around the female and fertilize the eggs which are settle in the substrate. Post-hatching the fry have external gill filaments which disappear after 10-12 days. On Hokkaido Island, Japan there exists a population that reproduces by parthenogenesis, and this all-female group lays eggs that don't require male fertilisation to develop, but with the requirement that the sperm of a closely-related species is necessary to induce egg development. Scientists have shown that even the presence of Goldfish (Carassius auratus) sperm is sufficient to produce a good number of viable eggs. This phenomenon is also known in some European Cobitis species.
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