Experimental tuna longline operations were carried out in the Lakshadweep Sea on board modified Pablo boats which are originally used for pole and line fishing for skipjack tuna (Katsuwonus pelamis). Catch composition, size frequency and CPUE of the tuna longline operations were analyzed. Sharks, tuna, sailfishes and miscellaneous fishes were the catch. Shark contributed 67.6% of the overall catch followed by tuna (18.7%). Hooking rate of tuna was 4.6 1000-1 hooks compared to (16, 3.4 and 2.2 for sharks, sailfishes and miscellaneous fishes, respectively). Silky sharks (Carcharhinus falciformes) alone contributed 89.9% to the total shark catch. Overall hooking rate was better during evening compared to morning. There was no significant difference in the overall catch rate between pre-monsoon and post-monsoon operations.