River
Jamanxim
5 profiles across 5 families name the Jamanxim as a locality.
- Species
- 5
- Families
- 5
- Photographed
- 5 of 5
- Difficulty rated
- 5 of 5
Basin
Also in the Amazon basinspecies recorded from both
Shares fishes with rivers elsewherespecies recorded from both
Runs through

Boulengerella maculata
Ctenoluciidae · Valenciennes, 1850
Both species also possesses a broader dark midlateral stripe on the body which tends to be more well-defined in B. lateristriga than in B. maculata. Colour pattern in B. maculata varies considerably with some specimens noticeably paler than others, for example, and the the broad midlateral stripe usually less intense in such individuals. This does not app...

Colomesus asellusAmazon Puffer
Tetraodontidae · Müller & Troschel, 1849
This species is also referred to as 'South American puffer', 'SAP', 'Amazonian puffer', 'Peruvian puffer', or 'Brazilian puffer' in the ornamental trade. Within the genus Colomesus, C. asellus can be immediately identified by possessing a unique transverse row of dermal flaps across the chin which is absent in its congeners C. psittacus and C. tocantinensis.

Hyphessobrycon pulchripinnisLemon Tetra
Characidae · Ahl, 1937
This species is a popular aquarium fish and is bred on a commercial basis in several countries, with a selectively-bred albino form also available. Wild specimens are rarely collected due to the low price of the farmed fish, but the origin of the commercial strain is questionable. The species was considered endemic to the rio Tapajós basin, but in the early 1990s fish appearing identical to the aquarium form were photographed in the...

Retroculus xinguensis
Cichlidae · Gosse, 1971
The precise extent of this species' range is unclear. The majority of records pertain to the lower rio Xingu basin in the state of Pará, northern Brazil, including middle and lower reaches of its major tributary the rio Iriri, although the type locality is in Mato Grosso state several hundred kilometres upstream. There also exist a handful of records from the rio Jamanxim (a major affluent of the rio Tapajós which drain...

Synaptolaemus latofasciatus
Anostomidae · Steindachner, 1910
This species was described from a single specimen and included in the genus Leporinus until 2011 at which point the holotype was examined and recognised as corresponding to the fish described as Synaptolaemus cingulatus (Myers & Fernández-Yépez, 1950).