A file photo taken on October 4, 2006 shows a diver attaching a sensor on a large Echizen jellyfish off the coast of Komatsu in Ishikawa prefecture, northern Japan.

• 图为2006年10月4日的档案照，照片中可见一潜水人员正在日本北部百峰村小松岸外海域帮一只大型越前水母装感应器。