Knodus borki

Knodus borki is a small South American characin commonly known in the aquarium hobby as the Blue Tetra, and it is admired for its metallic blue sheen, slender body shape, and energetic swimming style that gives a bright sense of movement to the aquarium. Its appeal becomes especially clear when kept in a group, where the reflected blue tones and coordinated activity create a lively yet elegant display in planted layouts or tanks with open swimming space. Understanding Knodus borki requires attention to its active and sometimes assertive nature, so keeping it in a proper group, providing enough room to swim, avoiding slow long-finned tankmates, and maintaining clean, stable tropical water are important points for bringing out its color, health, and natural behavior.