Taxonomy & naming
Dan's Fish sells this fish as Melanotaenia sp. "Running River". This is an undescribed form: its identity and range are not documented in the atlas's sources. The trade name is a collection locality.
Morphology
Dan's Fish gives the maximum size as unknown and suggests 4–5 inches (4–5 in). It describes rainbowfish generally as peaceful and active, with males flashing a bright iridescent stripe.
Habitat
Dan's Fish lists the natural range as Running River, North Queensland, Australia. Melanotaenia are rainbowfish of New Guinea and northern Australia (genus-level).
Feeding
Not recorded for this form. Rainbowfish are generally omnivores that take small invertebrates, algae and prepared foods (genus-level).
Mating
Not recorded for this form.
Breeding
Not recorded for this form.
In the aquarium
Dan's Fish lists the stock as tank bred and raised, sold unsexed at an estimated 2–2.75 inches (2–3 in). It says the fish was saved from near extinction in the wild and, for now, appears to be recovering.
Conservation
The seller reports that the wild population nearly disappeared and has since appeared to recover. The form has no IUCN assessment known to the atlas.