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Gymnostomus ariza (HAMILTON, 1807)

October 26th, 2014 — 5:31pm

Following Roberts (1997) G. ariza can be diagnosed by the following combination of characters: body with variably intense thin stripes dustributed mostly above the lateral line; larger individuals sometimes with a broad midlateral stripe; 32-35 lateral scales; 7-8/1/5-6 transverse scale rows; 8-9 branched dorsal-fin rays 8-9; 22-24+ 11-12=34(4), 35 (3) vertebrae; live colour pattern variable, overall dull dirty white to greyish, silvery or yellow.

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Ctenopharyngodon idella (VALENCIENNES, 1844)

Grass Carp

September 30th, 2014 — 12:57pm

Despite being a wholly unsuitable aquarium subject, C. idella is often traded as such, with an albino form having been developed specifically for the ornamental market.

Individuals which have outgrown their aquarium or pond should never be released into natural waters, either, since this species has proven capable of causing serious environmental damage under a wide range of climatic conditions.

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Xenentodon cancila (HAMILTON, 1822)

Freshwater Needlefish

March 13th, 2012 — 1:22pm

X. cancila is often seen referred to as ‘freshwater garfish’, and although it does superficially resemble the true gars of the family Lepisosteidae, it’s actually a member of the Belonidae, or needlefishes, the majority of which are marine or estuarine in existence.

There are currently just two species in the genus although the probable existence of a third member has been noted by Roberts (1989) among oth…

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Notopterus notopterus (PALLAS, 1769)

Bronze Featherback

March 13th, 2012 — 1:22pm

This species is also referred to as ‘Asian knifefish’ or ‘ghost knifefish’ in the aquarium trade in the aquarium trade but arguably has no place in the ornamental hobby given its adult size and specialised requirements.

It is sometimes confused with the African species Xenomystus nigri but is easily told apart by its larger adult size and presence (vs. absence) of a dorsal fin.

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Hemibagrus punctatus (JERDON, 1849)

Porthole Bagrid

March 13th, 2012 — 1:21pm

Confirmed localities include the Kabini, Bhadra and Moyar tributary systems where it was last collected in 1998, the 1980s and 1990-92, respectively.

The IUCN currently list it as Critically Endangered (possibly extinct).

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Botia striata NARAYAN RAO, 1920

Zebra Loach

March 13th, 2012 — 1:20pm

In a survey of fish diversity in the Bhadra River (which joins the Tunga to form the Tungabhadra) it was recorded alongside numerous other species including Puntius chola, Balitora mysorensis, and Mystus armatus. Dry season water paramaters were temperature 69.8°F/21°C, pH 7.0, hardness ~ 2.5°.

The substrate was composed of bedrock, boulders, cobbles, gravel, sand and leaf litter in descending order of abundance with a maximum depth of around…

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Dawkinsia arulius (JERDON, 1849)

March 13th, 2012 — 1:18pm

The fish appearing in the majority of earlier literature as P. arulius or ‘arulius barb’, and often still traded as such, is the related D. tambraparniei. Though similar the latter can be told apart from D. arulius by possession of filamentous extensions to the dorsal-fin rays in males, longer maxillary barbels measuring > ½ eye diameter, i.e., 2.4 – 4.7 % SL, and some aspects of colour pattern.

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Etroplus maculatus (BLOCH, 1795)

Orange Chromide

March 13th, 2012 — 1:18pm

Wild examples are rarely-seen in the aquarium hobby although selectively-bred ornamental strains are widely-available for which care is identical.

These are normally traded as ‘red’ or ‘yellow’ chromide and have a solid yellow-orange colour pattern with no dark elements.

It exhibits a widespread sympatry with the con…

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