Knodus borki is a species of characin endemic to Peru, where it is found in the vicinity of Iquitos. It is found in a freshwater environment within a benthopelagic depth range. This species is native to a tropical environment. It lives in the habitats of rivers, streams, and tributaries.
K. borki reaches about 2 in (5 cm) in length. It is one of several species known by the common name blue tetra.
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.