Cobitidae (Loaches)

Amur Weather Loach

Misgurnus anguillicaudatus

Misgurnus anguillicaudatus, known as the Amur Weather Loach, belongs to the family Cobitidae. This fish is most often known to anglers, as it is actively used as bait, although the species is generally quite common. It is less common in aquaristics. This species is undemanding to keep and is excellent for aquariums with coldwater (non-tropical) inhabitants.

Tank
from 200 L (53 gal)
Temperature
5 – 25 °C (41 – 77 °F)
Size in aquarium
20 – 30 cm (7.9 – 12 in)
Acidity
pH 6–8

Dangerous to small fish

Natural rangeRange on the map
  • Sakhalin area
  • East Siberia area
  • Korean Peninsula area
  • Cambodia
  • China
  • Hong Kong
  • India
  • Japan
  • Laos
  • Myanmar
  • North Korea
  • Russia
  • South Korea
  • Taiwan
  • Thailand
  • Vietnam

Tank conditions

Plan the tank stocking
Temperature
5 – 25 °C (41 – 77 °F)
Water pH
Slightly acidic (6) – Slightly alkaline (8)
Water dH
Very soft (1) – Hard (12)
Water salinity
no salt (freshwater)
Size in aquarium
20 – 30 cm (7.9 – 12 in)
Lifespan
10 years
Temperament
Semi-peaceful dangerous to smaller ones
Toward small fish
a risk to small fish
Required aquarium volume
from 200 L (53 gal)
Lighting
dimmed
Substrate
soft sandy including silted
Water flow
none or stagnant (no flow)
Feeding
Sinking (any)
Keeping
Both solitary and in group flexible
  • Lifespan. A lifespan to expect under good care, not a measured value: it depends heavily on tank volume, water quality and diet — and for selectively bred forms, on their origin as well.
  • Toward small fish. Based on the Predators category in the catalog or the temperament in the species parameters. “A risk to small fish” means the species is not a predator by habit, yet will swallow any fish that fits in its mouth.
  • Required aquarium volume. This is a husbandry recommendation, not a measured value: the volume depends on the keeping mode (both solitary and in group (flexible)), footprint, decor and tank mates.

Care and keeping

Description

Adults can reach a body length of 28 cm. The fish has an elongated, snake-like body. The main coloration is sandy, adorned with dark speckles arranged in rows. Near the mouth on the head are four pairs of sensitive barbels. The fins are short, and the tail is translucent.

Habitat

Initially, the habitats of the Amur Weather Loach included regions of the Far East, such as Sakhalin, Eastern Siberia, as well as North and South Korea, Japan, China, and Northern Vietnam. Today, due to artificial propagation, this species has colonized new territories and is found in Australia, North America (Canada and the USA). It prefers to inhabit shallow areas of rivers and streams with slow currents, lakes, swamps, and flooded rice fields. Most often, it can be found in bodies of water with dense riparian vegetation and soft sandy bottom sediments.

Behavior and Compatibility

This species coexists peacefully with other fish of comparable size that also prefer cool water. Various selective forms of Goldfish can be excellent tankmates for them. The loach is peaceful both with conspecifics and other species, but it may prey on eggs, fry and very small fishes — choose larger tankmates.

Care and Maintenance

For a group of 3–4 Amur Weather Loaches, an aquarium of at least 200 liters is recommended. The width of the tank is more important than its depth. A soft sandy substrate is an essential element of the setup; the Amur Weather Loach will occasionally burrow into it, leaving only its head exposed. Rocky or gravel substrates should be avoided. Aquatic plants, driftwood, and other natural or artificial elements that can provide hiding places can be used as decor. Live plants, due to their tendency for active digging, should preferably be planted in separate pots. This species is characterized by its unpretentiousness and hardiness, its ability to adapt to a wide range of conditions, which makes its keeping quite simple. It is important to remember that this is a coldwater fish, so prolonged keeping in warm water should be avoided. An unheated aquarium with soft lighting is perfectly suitable for the Amur Weather Loach.

Diet

In their natural environment, Amur Weather Loaches feed on various small invertebrates, such as insect larvae, small crustaceans, and worms. In aquarium conditions, it is preferable to offer them live or frozen foods, such as bloodworms, brine shrimp, or small earthworms. As a supplement or alternative, dry sinking foods, such as flakes or granules with a high protein content, can be used.

Breeding and Reproduction

Reproduction of the Amur Weather Loach is rarely observed in artificial conditions. To stimulate spawning for commercial purposes, hormonal preparations are administered.

Diseases

The Amur Weather Loach is highly resilient, but when kept in suboptimal conditions, especially with elevated water temperatures, its immune system is significantly weakened, making the fish susceptible to various infections. Due to its sensitivity to a number of common aquarium medications, it is recommended to treat sick individuals in a separate quarantine tank. Key factors for disease prevention: — maintaining water temperature within a moderate range, as overheating promotes the development of pathogens; — using a soft sandy substrate to prevent mechanical damage to the delicate barbels and skin; — ensuring high water quality and regular filtration to prevent the accumulation of organic waste.

How to choose

When purchasing, choose active, mobile individuals with clean skin, free of visible damage, ulcers, film, or spots. It is important to carefully examine the mouth area: in a healthy fish, the barbels should be intact, without signs of erosion or deformation, which indicates proper keeping conditions at the store. What to pay attention to: — absence of an unnaturally bloated or, conversely, severely sunken abdomen; — clear and transparent eyes, absence of cloudiness or hemorrhages; — reaction to external stimuli — a healthy fish should show caution and try to hide, rather than appearing apathetic or exhausted.

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Amur Weather Loach get?

An adult reaches 20–30 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Amur Weather Loach need?

The recommended volume is 200 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Amur Weather Loach need?

Temperature 5–25 °C, pH 6–8, hardness 1–12 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Amur Weather Loach live?

Around 10 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Amur Weather Loach aggressive?

Temperament: semi-peaceful (dangerous to smaller ones). Not a predatory species, but small fish that fit in its mouth will eventually be eaten.

How many Amur Weather Loach should be kept together?

Recommended setup: both solitary and in group (flexible). Ignoring this is a common cause of stress and disease.

What does Amur Weather Loach eat?

Diet type: sinking (any). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Amur Weather Loach?

The scientific name of the species is Misgurnus anguillicaudatus, family Cobitidae (Loaches). It also appears in the literature as: Cobitichthys dichachrous, Cobitichthys enalios, Cobitichthys polynema.

Similar fishes

Matched by family, categories and overlapping keeping conditions

Horseface Loach

Horseface Loach

Acantopsis dialuzona

Cobitidae (Loaches)

The horseface loach (Acantopsis dialuzona) belongs to the family Cobitidae and is a peaceful, calm aquarium fish. It can be kept successfully with many types of tropical fish. It has no special care requirements.…

Burmese Loach

Burmese Loach

Lepidocephalichthys berdmorei

Cobitidae (Loaches)

The scientific name Lepidocephalichthys berdmorei, or Burmese Loach, belongs to the family Cobitidae. This name refers to Burma, the modern state of Myanmar in Southeast Asia, where this species originates. The fish is…

Blue Botia

Blue Botia

Yasuhikotakia modesta

Botiidae

The blue botia, or Blue Botia (Yasuhikotakia modesta), belongs to the family Botiidae and is also known as the red-tailed botia. This peaceful fish reaches a moderate size and is simple to keep, making it a good choice…

Gongota Loach

Gongota Loach

Canthophrys gongota

Cobitidae (Loaches)

The Gongota Loach, scientifically known as Canthophrys gongota, belongs to the family Cobitidae, or true loaches. This species inhabits natural waters of Nepal, northern India, and Bangladesh, where it populates the…

Other scientific names and conservation status

Other scientific names
Cobitichthys dichachrous, Cobitichthys enalios, Cobitichthys polynema, Cobitis anguillicaudata, Cobitis bifurcata, Cobitis cirrhifurcata
Categories
Loaches
Conservation status
Least concernLC