Misgurnus fossilis

Misgurnus fossilis, the European weatherfish, is a freshwater loach native to Europe. It inhabits slow-moving or stagnant waters and can gulp atmospheric air.

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Cobitidae: Cobitidae is a family of small freshwater fishes commonly known as true loaches. This family contains Misgurnus fossilis and defines its closest taxonomic grouping.
Intestinal respiration: Intestinal respiration is gas exchange across the digestive tract after air is swallowed. The weatherfish can gulp air and absorb oxygen through its intestine.
IUCN Red List: The IUCN Red List assesses the extinction risk of species worldwide. Its assessments provide a framework for tracking the weatherfish's conservation status.
Misgurnus anguillicaudatus: Misgurnus anguillicaudatus, the oriental weatherfish, is an Asian loach introduced to waters beyond its native range. This close relative shares air-gulping behavior but is native to East Asia.
Misgurnus: Misgurnus is a genus of freshwater loaches native to Eurasia. The European weatherfish is one species within this genus.
Facultative air breathing: Facultative air breathing is the ability to breathe air when conditions make aquatic respiration inadequate. This ability helps the species tolerate water with low dissolved oxygen.
Habitat fragmentation: Habitat fragmentation is the division of continuous habitat into smaller, isolated patches. Dams and modified waterways can separate populations and restrict movement.
Cobitis taenia: Cobitis taenia, the spined loach, is a small European freshwater fish in the family Cobitidae. It is another European cobitid occupying freshwater bottoms, but belongs to a different genus.
Loach: Loaches are a varied group of small freshwater fishes, many with barbels around the mouth. Its common name places this species among bottom-dwelling loaches.
Hypoxia (environmental): Environmental hypoxia is a shortage of oxygen available to organisms in water, soil, or air. Low oxygen is a condition the weatherfish can partly overcome by gulping air.