Stone moroko

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  (Redirected from Pseudorasbora parva)
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Stone moroko
Pseudorasbora parva(edited version).jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cyprinidae
Subfamily: Gobioninae
Genus: Pseudorasbora
Species: P. parva
Binomial name
Pseudorasbora parva
Temminck & Schlegel, 1846
  • Leuciscus parvus Temminck & Schlegel, 1846
  • Pseudorasbora parvus (Temminck & Schlegel, 1846)
  • Fundulus virescens Temminck & Schlegel, 1846
  • Micraspius mianowskii Dybowski, 1896
  • Pseudorasbora altipinna Nichols, 1925
  • Pseudorasbora depressirostris Nichols, 1925
  • Pseudorasbora fowleri Nichols, 1925
  • Pseudorasbora monstrosa Nichols, 1925

The stone moroko (Pseudorasbora parva), also known as the topmouth gudgeon, is a fish belonging to the Cyprinid family, native to Asia, but introduced and now considered an invasive species in Europe. The fish's size is rarely above 8 cm and usually 2 to 7.5 cm long.[2]

Invasive species[edit]

The fish was introduced in the 1960s into ponds in Nucet, Dâmboviţa County, Romania and it made its way into Danube, then spreading throughout Europe. They pose danger to other species such as the sunbleaks (Leucaspius delineatus). They are the carrier of a parasite (Sphaerothecum destruens[3]) that is not damaging to the topmouth gudgeon, but attacks other fishes like the sunbleaks, which are unable to spawn and have a higher mortality when infected.[4] They also feed on eggs of locally valuable native fish species.

The species has also been recently discovered in several lakes in the UK where it is believed to have been illegally stocked.This has called for a large scale eradication programme organised by the Environment Agency who kill the fish off with a piscicide called rotenone.