Knodus borki is a species of characin endemic to Peru,[1] where it is found in the vicinity of Iquitos.

It is found in a freshwater environment within a benthopelagic depth range.

[1] It lives in the habitats of rivers, streams, and tributaries.

[2] It is one of several species known by the common name blue tetra.

[2] Named in honor of German aquarist Dieter Bork, "who has contributed much to the development of aquariology as a dedicated aquarium friend (breeder, author and photographer)"; he also supplied the type specimen.