The Kikori river system is known for its biodiversity. Mount Bosavi, which is well-known in this respect, lies on the western edge of the Kikori river basin. The catchment area of the Kikori is with more than 100 species of fish, of which 14 percent are endemic, along with the western, and much longer Fly River, it is the most species rich river in New Guinea. However, most of the endemic fish do not live in the rivers, but in Lake Kutubu. Furthermore, in the Kikori Basin there are three species of cherax, an endemic blind cavern Oxyeleotris caeca and six species of freshwater turtles.