Experimental daytime jigging operation was conducted to develop the optimum fishing technology, instead of drift net fishery, for large-size neon flying squid in the North Pacific Ocean. Using underwater fishing light set at a depth of 180m, the only target species was caught at depths of 240m-300m. The observation of capturing characteristics and echo images with a fish finder indicated that the squid made their sparse school with a small number of the individuals. Besides this way of jigging seems to provide useful information to determine the fishing position and to make an effective start for the evening operation.
