<;P>;PROBLEM TO BE SOLVED: To provide a method for efficiently collecting seeds and seedlings of shellfishes. <;P>;SOLUTION: There is provided the method for collecting the seeds and seedlings of the shellfishes by a suspending method. In the method for collecting the seeds and seedlings of the shellfishes, a seedling collector coated with a hydraulic composition comprising cement and a lightweight fine aggregate is used. <;P>;COPYRIGHT: (C)2011,JPO&INPIT