In the present work an attempt has been made to study oxygen consumption in different weight groups of a teleostean fish, Puntius sophore (Ham.) at habitual water temperature in winter and summer months to assess compensatory regulation in their metabolism to seasonal thermal variations. The experiments were conducted at 19.0±1.00C (winter) and 29.2±1.00C (summer months). Though at both the habitual temperatures, a clear trend of increase in total oxygen consumption with increasing body weight was observed but it increased with a value of 0.64 (b value or regression coefficient) in summer months while such value was recorded to be 0.80 (b value) in winter months indicating compensatory regulation in their metabolism to seasonal thermal variations. The details have been discussed in this paper.