This small, colourful fish is threatened by an increase in human activities in the areas surrounding its habitat. Large-scale slash-and-burn deforestation, such as that occurring around Lake Alaotra (10), results in soil erosion and run-off into the surrounding rivers and streams. The increased silt suspended in the water disrupts water flow, smothers fish eggs, and generally creates an unfavourable environment (6).
There is also an active fishery for this species in Lake Alaotra (4). Heavy fishing pressure has resulted in the katranas in the lake having a much smaller average length than that of populations inhabiting rivers (9).
Invasive fish species, introduced by humans to increase fishery productivity, are an ever-increasing problem to the native fishes of Madagascar. It is not known how precisely these species displace the native fishes, but it is suspected a mix of predation and competition is responsible (6).