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Opsarius infrafasciatus (FOWLER, 1934)

April 18th, 2013 — 4:54pm

This species has previously been considered synonymous with both O. ornatus and O. pulchellus but is currently considered to be distinct following (Tejavej, 2012).

It can be distinguished from congeners by a combination of characters including: small caudal spot presen…

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Barilius vagra (HAMILTON, 1822)

October 9th, 2012 — 10:40am

Barilius spp. are near-exclusive surface-feeders preying mostly on flying insects in nature with some small fishes and benthic invertebrates probably taken as well but in the aquarium they’re largely unfussy and will accept most foods.

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Barilius shacra (HAMILTON, 1822)

October 8th, 2012 — 2:15pm

Like many fishes that naturally inhabit running waters it’s intolerant to the accumulation of organic wastes and requires spotless water at all times in order to thrive. It also does best if there is a high proportion of dissolved oxygen and moderate degree of water movement so external filters, powerheads, airstones, etc., should be employed as necessary.

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Opsarius pulchellus (SMITH, 1931)

October 5th, 2012 — 4:45pm

This species is traded for aquaria under various names including ‘butterfly barb’, ‘mackerel barb’, ‘green-barred danio’, and ‘royal opsarius’.

It can be told apart from other memb…

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Opsarius ornatus (SAUVAGE, 1883)

October 5th, 2012 — 3:30pm

Type locality is ‘Mé-Nam River, Thailand’, with ‘Mé-Nam’ having been considered an older name for the Chao Phraya river in central and western Thailand prior to this species’ redescription by Tejavej (2012).

In fact ‘menam’ is the Thai word for ‘river’ and thus could refer to any drainage, and B. ornatus is restricted to…

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Opsarius koratensis (SMITH, 1931)

October 5th, 2012 — 11:52am

Inhabits well-oxygenated, low-to-medium gradient, slow to moderate-flowing rivers and streams with substrates of gravel, cobbles, larger boulders and exposed bedrock. At the habitat in our image pH was 7.5, temperature 26°C and cond…

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Barilius gatensis (VALENCIENNES, 1844)

Malabar Baril

October 5th, 2012 — 10:42am

This species is traded very occasionally, sometimes under the alternative vernacular names of ‘river baril, ‘river carp-baril’, or ‘striated hill trout’.

It can be told apart from congeners by the following combination of characters: 1 pair of minute rostra…

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Opsarius dogarsinghi (HORA, 1921)

Manipur Baril

October 4th, 2012 — 4:55pm

Described from ‘Etok stream near Chanderkhong, southern watershed of the Naga Hills, Manipur, Assam’, located within the Chindwin River basin in northern India.

The Chindwin is the major tributary of the Ayeyarwady/Irrawaddy River and most of it flows within Myanmar although two of its own tributaries, the Manipur and Yu rivers, originate in the Indian states of Manipur and Nagaland.

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Opsarius caudiocellatus (CHU, 1984)

October 4th, 2012 — 3:07pm

This species may have appeared in the aquarium trade though probably not under the correct name.

It can be told apart from similar-looking congeners by the following combination of characters: presence of a black round spot at the caudal base; dorsal-fin rays black with connecting membranes transparent; posterior dorsal-fin origin located midway between upper angle of gill aperture and caudal-fin base, or slightly closer to the latter.

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Barilius canarensis (JERDON, 1849)

October 4th, 2012 — 10:49am

Type locality is ‘Canara, southern India’, which corresponds to a coastal region of approximately 300 km in length covering several districts of Karnataka and Kerala states, southwestern India.

Rivers in this area drain the Western Gha…

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