Histopathological study of the kidney, liver and intestine tissues in goldfish (Carassius auratus) and angelfish (Pterophyllum sp.)

Histopathology is used for diagnosis of diseases in aquatic animals. This study was conductedto investigate histopathological lesions of kidney, liver and intestine of goldfish (Carassius auratus) andangelfish (Pterophyllum sp.) in some aquarium shops during a period between January-April 2010.Several histological alterations were observed in kidney which include glomerulonephritis, cell swelling ofepithelial cells, tubular epithelium necrosis, hyaline droplets and hyaline cast in renal tubules and tubulardilation. Liver showed vacuolar degeneration of hepatocytes, karyolysis and karyorrhexis and focal areasof necrosis, haemorrhagia and hepatitis. In intestine, atrophy of epithelial cells and enteritis on thelamina propria and submucosal layer were seen. It was concluded that unfavourable environmentalcontamination of aquarium may induced several histopathological alterations in the tissues of goldfishand angelfishes.