Renal Tubular Morphology in the Channel Catfish (Ictalurus punctatus) Kidney

Kidneys of 50 channel catfish (Ictalurus punctatus) (25–30 cm long) obtained from a fish hatchery were subjected to light microscopic examination. All renal tubular segments generally found in freshwater teleost kidney were present. These included a ciliated neck segment, bisegmental proximal segment, ciliated intermediate segment, distal segment, and, in addition, collecting ducts.