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Topmouth Gudgeon, Pseudorasbora parva

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Short description of Pseudorasbora parva, Topmouth Gudgeon

Elongate, slightly flattened sides, resembling Gobio. To 110 mm. Mouth in top position. Dorsal and anal fins short; caudal fin large, deeply incised. Grey back, pale sides/belly. Juveniles with dark stripe along sides. Characteristic lunate spots in caudal part of scales. Fins pale; darker stripe running obliquely backwards on dorsal fin. During spawning, males darker with tubercles on head, females paler.

Description of Pseudorasbora parva, Topmouth Gudgeon status in GB

Widespread but scattered in England and (to a lesser extent) Wales, mainly in isolated water-bodies but also some connected systems.

Habitat summary: Pseudorasbora parva, Topmouth Gudgeon

Found in a wide variety of habitats; most abundant in well vegetated small channels, ponds and small lakes. Adults occur preferentially in cool, shallow water, either still or slow-flowing, especially with abundant macrophytes.

Overview table

Environment: Freshwater
Species status: Non-Native
Native range: Anhui, Beijing, Fujian, Gansu, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Tibet, Zhejiang, Hokkaido, Honshu, Kyushu, Nansei-shoto, North Korea, South Korea, Khabarovsk, Primorye, Taiwan
Functional type: Predator
Status in England: Non-Native
Location of first record: Outflow stream, Crampmoor fishery (Hampshire)
Date of first record: 1990

Distribution map

Map of the UK with areas shaded to show the UK distribution of Topmouth Gudgeon

GB Distribution from NBN Atlas

Author's name:

Dr. David Hubble

Last updated:

October 4th 2019

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