Bedotia geayi

Bedotia geayi is a small freshwater fish belonging to the family Bedotiidae, a group of rainbowfishes endemic to Madagascar. Males display an elongated dorsal and anal fin with orange-red coloration edged in black, while females are typically more subdued in color, a common form of sexual dimorphism in this family. The species is a shoaling fish, moving in loose groups through slow to moderately flowing water, and it feeds on small invertebrates and organic material drifting through its habitat.

As a mid-level consumer, it contributes to the transfer of energy between aquatic invertebrates and larger predators within its river systems.

The species inhabits freshwater streams and rivers associated with forested landscapes in eastern Madagascar, where tree cover helps regulate water temperature, flow, and sediment levels. Its range is naturally restricted to this region, making it highly dependent on the ecological integrity of these forest-linked waterways.

Its principal threats are habitat degradation from logging and wood harvesting, which leads to erosion, sedimentation, and altered stream conditions, and competition or predation pressure from invasive non-native fish species introduced into Malagasy waterways. These pressures have contributed to a continuing decline in population numbers, although precise figures are not established.

Conservation attention for Madagascar's freshwater fish fauna includes habitat protection efforts tied to forest conservation zones and monitoring of introduced species, though enforcement and resources remain limited in much of its range. Captive breeding populations exist through aquarium hobbyist and institutional networks, which may serve as a genetic safeguard.

Given ongoing deforestation and the persistence of invasive species in its habitat, the species' population trajectory remains downward, and its long-term status depends on more effective watershed and forest protection in Madagascar.