Hemigrammus bleheri – Firehead Tetra (Hemigrammus bleheri)
This is the species most commonly sold as 'rummy-nose tetra' in aquatic outlets. A selectively-bred "golden" variant has also been produced by commercial breeders and is available from time-to-time. The natural form is very similar to both the "true" rummy-nose, Hemigrammus rhodostomus and the 'false' rummy-nose, Petitella georgiae in appearance. The 3 species can distinguished by several factors.
The first is by the extent to which the red colouration…
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