Looming in the background is another reason why Chang has gone to great lengths to provide for his precious mollusks: "It used to be that Nanfang-ao-based boats would pull up ten Rumphius 'slit shells in a year, but last year they only pulled up two!"
張議顯煞費周章珍愛活體寶「貝」，背後還有一個更迫切的理由：「過去南方澳一年可以撈到十幾顆龍宮貝，2005 年卻只撈到 2 顆！」