PURPOSE: A cracker for the catch of tuna is provided to save work labor and work time by integrally charging an explosive and dyes in the explosive bomb and inputting the dyes upon the explosion and the generation of flash. CONSTITUTION: A cracker is comprised of an outer shell(11) for making an explosive(15) and a cracker(10) keep specific weight by sequentially charging sand; upper and lower finishing layers(12a,12b) fixed on upper and lower parts to finish the upper and lower ends of the outer shell; a fuse(16) penetrating through the upper finish layer of the upper part to ignite the explosive; a dye layer(14) filled in the outer shell and made up of the sand and the dyes at a specific ratio to incur eyesight troubles of tuna; a tube(18) for preventing the fuse from being put out upon contacting sea water; and a protection cap(19) for preventing an ignited flame from transferring to and igniting other fuses. Thereby, work labor and work time for discharging the explosive bomb are minimized.
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