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The paper deals with statistical analysis of fish brain and body parameter in a cold water small cat fish Amblyceps mangois (Ham.-Buch.) from Garhwal Central Himalayan region. During the course of study a total of 82 specimens were selected and were carried out for statistical observation. It was observed that standard length of fish fluctuated between 42.38 ± 1.80 mm to 71.00 ± 0.20 mm while the fish weight, brain length and brain weight fluctuated from 1408.69 ± 103.39 mg to 3966.00 ± 202.03 mg , 6.23 ± 0.83 mm to 8.83 ± 0.41 mm and 4.92 ± 0.95 mg to 12.00 ± 2.28 mg respectively.