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Cobitis taenia, commonly known as the Spined Loach or Koza, is a small, elongated freshwater fish belonging to the family Cobitidae. It is characterized by its slender body, cryptic coloration, and a distinctive bifid (two-pointed) spine located beneath each eye, which can be erected as a defense mechanism. This species is primarily nocturnal and benthic, inhabiting slow-moving or still waters with sandy or muddy substrates where it burrows during the day.
Cechy fizyczne
- Kształt ciała
- elongated
- Ubarwienie
- Dorsal side is typically yellowish-brown to olive-green, with a series of 10-20 dark, oval spots or blotches along the lateral line. The ventral side is paler, often whitish or yellowish. Fins are usually translucent with faint spotting.
- Rodzaj łusek
- cycloid
- Ułożenie pyska
- inferior
- Cechy charakterystyczne
- Slender, eel-like body, laterally compressed., Six barbels around the mouth (two rostral, four maxillary)., A prominent, erectile, bifid spine beneath each eye., Small, embedded scales, giving a smooth appearance., Sexual dimorphism: Males possess a thickened pectoral fin ray (Canestrini's scale) and are generally smaller and more slender than females.
- Płetwa grzbietowa
- Short, located posterior to the midpoint of the body, with 7-8 branched rays.
- Płetwa ogonowa
- Truncate or slightly emarginate, with 12-14 branched rays.
- Płetwa piersiowa
- Small, rounded, with 7-8 rays. Males have a distinct Canestrini's scale on the second ray.
- Charakterystyczne płetwy
- Pelvic fins are small, abdominal, with 5-6 rays. Anal fin is short, with 5-6 branched rays.
Wskazówki dotyczące identyfikacji
Body Shape and Size
Elongated, slender body, typically reaching 8-12 cm in length, rarely up to 15 cm. Laterally compressed.
Coloration and Pattern
Yellowish-brown to olive-green back with a row of dark, oval spots along the lateral line. Pale belly.
Suborbital Spine
Presence of a sharp, erectile, bifid spine beneath each eye. This is a key diagnostic feature.
Barbels
Six small barbels around the mouth, used for foraging in the substrate.
Scales
Very small, embedded scales, making the skin appear smooth.
Siedlisko
- Rodzaj wody
- freshwater
- Głębokość
- Typically found in shallow waters, usually less than 2 meters.
- Środowisko
- Prefers slow-moving or still waters of rivers, streams, canals, lakes, and ponds. Thrives in areas with soft, sandy, or muddy substrates, often with dense aquatic vegetation. Tolerant of low oxygen conditions due to its ability to gulp atmospheric air.
- Zasięg geograficzny
- Widespread across Europe and parts of Asia. Its range extends from France and the British Isles eastward through Central and Eastern Europe, reaching into Siberia and parts of East Asia (e.g., Japan, Korea, China). Absent from Scandinavia (except southern Sweden) and southern Europe (except parts of the Balkans).
Informacje o akwarium
- Poziom trudności hodowli: intermediate
- Temperament: peaceful
- Dieta: omnivore
- Minimalny rozmiar akwarium: 75 liters (20 gallons)
- Temperatura: 10-25°C (50-77°F)
- Poziom pH: 6.5-7.5
- Twardość wody: 5-15 dGH
- Kompatybilność: Compatible with other peaceful, similarly sized fish. Avoid aggressive or very large tank mates. Best kept in groups of 3-5 individuals.
- Wymagania specjalne: Requires a soft, sandy substrate for burrowing, ample hiding places (plants, driftwood, rocks), and good water quality with moderate flow. Sensitive to poor water conditions and high nitrate levels.
Informacje ze środowiska naturalnego
- Status ochrony: least concern
- Sezonowość: Spawning occurs from April to July, depending on geographic location and water temperature. More active and visible during warmer months.
- Cena rynkowa: Low
- Znaczenie handlowe: low
- Smak: Mild, slightly earthy
- Konsystencja: Delicate, soft
- Sposoby przygotowania: Frying, Stewing, Soup
- Wartość odżywcza: Low in fat, good source of protein. Typically consumed in regions where it is abundant, but not a primary food fish.
Kluczowe fakty
Burrowing Behaviorbehavior
Cobitis taenia is known for its ability to burrow rapidly into soft substrates, often burying itself completely during the day or when threatened, leaving only its eyes exposed.
Air Breathingbehavior
This species can gulp atmospheric air at the water surface and absorb oxygen through its highly vascularized hindgut, allowing it to survive in oxygen-depleted waters.
Weather Sensitivityinteresting
Like some other loaches, Cobitis taenia can become more active and swim erratically before changes in atmospheric pressure, earning it the nickname 'weatherfish' in some regions.
Cryptic Camouflagebehavior
Its mottled coloration and ability to burrow provide excellent camouflage against the sandy or muddy bottom, making it difficult for predators to spot.
Ecological Roleinteresting
As a benthic invertebrate feeder, it plays a role in bioturbation of sediments and is a food source for larger fish and piscivorous birds.
Informacje o bezpieczeństwie
Obchodzić się ostrożnie- Poziom bezpieczeństwa: caution
- Jadowita: Nie
- Jadalność: not recommended
- Uwagi dotyczące obchodzenia się: When handling, care should be taken due to the sharp, erectile suborbital spines, which can cause a painful prick. These spines are not venomous but can cause minor injury. It is best to avoid direct contact with the head region. They are generally harmless to humans otherwise.
Podobne gatunki
Weather Loach
Misgurnus fossilis
Larger (up to 30 cm), more robust body, 10 barbels around the mouth, and a more uniform brownish coloration without distinct lateral spots. The suborbital spine is absent.
Golden Loach
Sabanejewia aurata
Generally smaller, with a more pronounced golden or yellowish hue and often more irregular, smaller spots or marbling. The suborbital spine is present but may be less prominent or differently shaped in some subspecies. Genetic analysis is often required for definitive differentiation in areas of sympatry.
Stone Loach
Barbatula barbatula
Has a more cylindrical body, larger and more distinct dark blotches or marbling, and lacks the suborbital spine. Its mouth is also more distinctly inferior with thicker lips.
Klasyfikacja naukowa
- Królestwo
- Animalia
- Typ
- Chordata
- Klasa
- Actinopterygii
- Rząd
- Cypriniformes
- Rodzina
- Cobitidae
- Rodzaj
- Cobitis
- Gatunek
- Cobitis taenia
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