This document summarizes a study on the length-weight relationship and condition factor of Tetraodon cutcutia fish collected from Neematighat, Assam, India between April 2011 and March 2013. The growth coefficient (b) and condition factor (K) were calculated monthly, seasonally, and by sex. b values ranged from 1.13-2.33 for males and 1.19-5.32 for females, indicating allometric growth. K ranged from 2.66-6.722 for males and 2.362-7.048 for females. Seasonally, b was lowest in pre-monsoon and highest in post-monsoon for males, while K was highest in winter for both