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Channa burmanica CHAUDHURI, 1919

July 2nd, 2013 — 4:54pm

It’s one of several genus members to lack pelvic fins and following Chaudhuri (1919) also has 51 lateral line scales, 38 dorsal-fin rays, 28 anal-fin rays, 12 caudal-fin rays, 15 predorsal scales, pectoral-fins with alternating dark and light bands, and white-tipped dorsal…

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Channa barca (HAMILTON, 1822)

June 30th, 2013 — 4:50pm

Has been observed to inhabit vertical burrows around the margins of wetlands which typically become dry during winter months.

These burrows are most often around a metre dee…

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Channa baramensis (STEINDACHNER, 1901)

Baram Snakehead

June 30th, 2013 — 3:24pm

This species was considered a synonym of Channa melasoma for a number of years prior to its revalidation by Ng. et al. (1996).

Specimens larger than around 120 mm SL can be distinguished by possession of a black spot in the centre of numerous body scales and a barred caudal-fin pattern, characters which are missing in both C. melasoma and the similar-looking C. cyanospilos.

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Channa argus (CANTOR, 1842)

Northern Snakehead

June 30th, 2013 — 2:28pm

This species is largely unsuitable for the home aquarium given its eventual size and natural behaviour, and we know of only a handful of private aquarists with the facilities required to house it long-term.

It’s currently illegal to import or own the species in the United States, United Kingdom and several other countries unless in possession of an official license.

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Channa asiatica (LINNAEUS, 1758)

Chinese Snakehead

June 30th, 2013 — 12:58pm

No bubble nest is built and several thousand eggs simply float at the surface with both male and female remaining to defend the eggs and fry.

The eggs hatch after 24-36 hours depending on temperature and the fry are free swimming in a further 24 hours. At this point they resemble 6-7 mm long black tadpoles.

It is important to constantly feed…

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Rhinogobius mekongianus (PELLEGRIN & FANG, 1940)

June 24th, 2013 — 12:20pm

Known from various parts of the middle and upper Mekong river basins with record existing from the Nam Tha, Nam Ou, Nam Khan, Nam Lik, Nam Ngum and Nam Mang tributary systems in Laos, the Nam Noeua (a tributary of Nam Ou) in Vietnam, and the Mae Nam Kok in Thailand.

Occurrences in the Chao Phraya drainage in central Thailand most likely refer to the congener R. chiengmaiensis.

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Rhinogobius chiengmaiensis FOWLER, 1934

Chiangmai Stream Goby

June 21st, 2013 — 4:11pm

This species has been exported for the ornamental trade but often labelled as the congener R. mekongianus.

Although the two do appear relatively similar R. chiengmaiensis can be identified by a combination of external characters including: presence of 5 irregular dark markings on the body (vs. 7-8 i…

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Rhinogobius yaoshanensis (LUO, 1989)

June 21st, 2013 — 8:34am

This species’ name has appeared quite regularly on ornamental fish trade lists since the mid-00’s but it’s unclear whether the species itself has ever been exported since fish labelled as such do not appear to fully match the most recent key (see below).

That said, its natural habitats lie in the same region as the loach Yaoshania pachychilus so it’s reasonable to assume that some specimens may have been collected, and the fish in our images were ca…

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Rhinogobius formosanus OSHIMA, 1919

June 20th, 2013 — 3:26pm

This species was previously considered to be a subspecies of R. nagoyae but has generally been accepted as distinct since 2008.

It can be told apart from other Rhinogobius spp. from Taiwan by presence of irregular, wavy, reddish brown lines on the cheek and opercle.

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Rhinogobius maculafasciatus CHEN & SHAO, 1996

June 19th, 2013 — 4:23pm

This species may not yet have appeared in the ornamental trade but it has been collected by a few individuals.

It can be told apart from related species from Taiwan by possessing 30-32 longitudinal (lateral) scales vs. 32-39 in other species, and 6-8 scale rows between the origin of the first dorsal-fin and upper pectoral-fin base vs. 9-15 in other species.

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