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Clarias nigricans : ウィキペディア英語版 | Clarias nigricans
''Clarias nigricans'' is a species of clariid catfish. It is only known from the Mahakam River in eastern Borneo. The eel-like catfish of this region were long assumed to belong to the widespread species ''Clarias nieuhofii'' but examination of 6 specimens purchased from a fish market in Samarinda in 1999 and preserved specimens from the same location revealed consistent and distinctive differences indicating a separate species. This is an elongated catfish up to 30.8 cm (12.1 inches) standard length. Compared to ''C. nieuhofii'' it has a "neck" distinctly narrower than the head, giving the head an egg-shaped appearance when viewed from above or below and the overall colour is much darker: purplish grey with much fainter white spots arranged in one row below the lateral line instead of two. ==References==
*Ng, H. H. (2003). (''Clarias nigricans'', a new species of clariid catfish (Teleostei: Siluriformes) from eastern Borneo. ) ''The Raffles Bulletin of Zoology'' 51: 393–398. *
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