Ocellated octopus is caught along Imahama Beach. The shells of white-lined bittersweet, a bivalve shellfish, are tied at the hinge by rope so that a pair of shells will not separate, and hung from the longline at intervals of 1.5 meters. This method takes advantage of the octopus’s habit of entering small gaps between rocks. After the octopus goes between a pair of shells, it closes them by sucking with its suckers. The origin of this method is not known. Around 10 fishermen catch octopus in this way from January through mid-May. Their annual catch amounts to three tons.