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Kryptopterus limpok (BLEEKER, 1852)

April 4th, 2013 — 4:10pm

Type locality is ‘Palembang, Sumatra, Indonesia’, but this species is widely-distributed throughout much of Southeast Asia including major river systems in Thailand, Laos, Cambodia, Vietnam and Peninsular Malaysia plus the Greater Sunda Islands of Sumatra, Borneo and Java.

It’s been extensively recorded from the Mekong, Cha…

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Kryptopterus geminus NG, 2003

April 4th, 2013 — 1:30pm

This species is likely to be traded for aquaria but probably misidentified as the very similar-looking K. cyrptopterus with which wild populations were formerly considered conspecific.

These two are closely-related and can be distinguished from congeners by the dorsal profile lacking a nuchal concavity (vs. possessing a nuchal concavity) and possessing short maxillary barbels (extending to the pectoral-fin base vs. ext…

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Kryptopterus bicirrhis (VALENCIENNES, 1840)

April 4th, 2013 — 10:49am

Generally peaceful though it may predate on smaller fishes and is somewhat timid so does not compete well with much larger, robust or otherwise boisterous species.

Peaceful, comparably-sized cyprinids, loaches and other catfishes perhaps constitute the best options but be sure to research your choices thoroughly prior to purchase.

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Hemibagrus planiceps (VALENCIENNES, 1840)

March 2nd, 2013 — 9:26pm

This species is now considered endemic to Java but has been confused with the congeners H. gracilis (from eastern Peninsular Malaysia), H. velox (Sumatra) and H. bongan (Borneo) in the past, while the population formerly considered to inhabit northwestern Peninsular Malaysia has been described as H. divaricatus (Ng and Kottelat, 2013).

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Hemibagrus microphthalmus (DAY, 1877)

March 2nd, 2013 — 8:12pm

This species cannot be considered a suitable home aquarium‚ subject given its eventual size plus the fact it can live for‚ several decades.

It can be told apart from most oth…

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Hemibagrus macropterus BLEEKER, 1870

March 2nd, 2013 — 7:25pm

This species has been recorded from the Zhujiang (Pearl River), Changjiang (Yangtze River) and Qiantang Jiang in central and southern China.

Type locality is ‘Chang Jiang, China’, referring to the Yangtze.

It’s been adversely affected by dam construction and pollution across certain parts of its range and may be locally extirpated in some cases.

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Hemibagrus peguensis (BOULENGER, 1894)

March 2nd, 2013 — 6:34pm

Members of this assemblage can be told apart from other congeners by possession of 44–46 vertebrae, an adipose-fin with a relatively short base (< 20 % SL), a colour pattern comprising either distinct black spots arranged in vertical columns or irregular black vertical lines running along the flanks, and normally a reddish or orangish caudal-fin in life.

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Hemibagrus filamentus (FANG & CHAUX, 1949)

March 2nd, 2013 — 5:00pm

This species appears to be unknown in the aquarium trade but is a valued food fish within its native range.

Hemibagrus has been divided into a number of putative species groups which may or may not represent monophyletic assemblages, and following a major review by Ng and Kottelat (2013) H. filamentus is included in the H. nemurus group.

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Batasio travancoria HORA & LAW, 1941

Malabar Batasio

April 19th, 2012 — 3:47pm

The only other described member of the genus native to southwestern India is B. sharavtiensis which occurs a little further north than B. travancoria in Karanataka state. The two are easily distinguished by colour pattern in that B. travancoria possesses a darkish midlateral stripe and a poorly-defined, but normally visible, post-opercular spot, whereas B. sharavtiensis has no such mark…

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Batasio fluviatilis (DAY, 1888)

April 19th, 2012 — 3:39pm

Batasio havmolleri (Smith, 1931) is currently considered a junior synonym of B. fluviatilis.

Members of the genus Batasio are characterised by the following combination of characters; laterally-compressed body shape; presence of large sensory pores on the head; a narrow mental region; a pair of prominent posterior proces…

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