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Devario devario (HAMILTON, 1822)

Bengal Danio

March 13th, 2012 — 1:19pm

Ecological studies have revealed this species to be more of a generalist than its chiefly insectivorous congeners.

Aquatic and terrestrial insects form a significant proportion of the diet, but substantial amounts of filamentous algae and diatoms are consumed with water mites, fish scales, isopods, nematodes and detritus also taken occasionally.

In the aquarium it’s largely unfu…

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Brachydanio nigrofasciata (DAY, 1870)

Dwarf Spotted 'Danio'

March 13th, 2012 — 1:19pm

The genus Danio contains only the type species, D. dangila, separated on the basis of its larger size and the shape of the caudal-fin, which in adults is only slightly emarginate or even truncate in shape, a feature it shares only with Tinca tinca (the common tench) among other cyprinids.

The remaining species, of which B. rerio is thought to be the most ancient, are included in the revalidated genus Brachydanio Weber & de Beaufort, 1916.

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Brachydanio kerri (SMITH, 1931)

Blue 'Danio'

March 13th, 2012 — 1:19pm

Can be hard to find in aquarium shops, and there has been some confusion surrounding its identity in the past.

Base body colour is either powdery-blue or yellow-green (see ‘Distribution’) and this continues into the caudal-fin, while pinkish-yellow lateral stripes extend from opercle to caudal peduncle.

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Brachydanio rerio (HAMILTON, 1822)

Zebra 'Danio'

March 13th, 2012 — 1:19pm

This species is very peaceful indeed and can be combined with many of the most popular fish in the hobby including other small cyprinids as well as tetras, livebearers, rainbowfishes, anabantoids, catfishes and loaches.

As always when selecting a compatible community of…

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Brachydanio albolineata (BLYTH, 1860)

Pearl 'Danio'

March 13th, 2012 — 1:19pm

Doubts remain whether B. albolineata is representative of a single species or a group of similarly-patterned, closely-related fish, and the form from Chantaburi province in eastern Thailand was revalidated as B. pulchra (formerly Danio pulcher Smith, 1931) by Kottelat (2013). The status of the currently invalid Danio tweedei (Brittan, 1955) from Kedah state, northern Peninsular Malaysia may also be in question, since fish from that area are clearly…

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