Length-weight relationship and morphometrics of the sailfish, Istiophorus platypterus (Shaw & Nodder) from Parangipettai, Southeast coast of India

In the present study, the slope value (b) was in the expected '3' that indicates a fish becomes more slender as it increases in length. Further the slope value which is greater than 3 denoting stoutness or allometric growth. However, deviation from isometric growth is often observed, as most fish change their body shape as they grow.