These living fossils are hard to acquire. When a fishing boat lifts its nets it must stop them for an hour every ten meters of depth to allow any slit shells caught in them to depressurize, or else they might die from the rapid change in pressure.
活體龍宮貝取得不易，他拜託特定漁船不論捕撈到龍宮貝與否，起網時，每拉起 10 公尺，就須休息一小時減壓，以免龍宮貝活體受不了壓力急速改變而猝死。