A method for extracting aquatic animals from an apparatus 102 containing aquatic animals. The apparatus has a body with an open end 102a, a substantially closed end 102b, and one or more side walls 102c between the open end and the substantially closed end. At least a major portion of the side wall(s) are in the form of a flexible membrane and at least a major portion of the side wall(s) and the substantially closed end are substantially impervious to water. The method involves arranging the apparatus 102 with an open end 102a of the apparatus positioned higher than a substantially closed end 102b of the apparatus, introducing a flow of liquid into an interior region of the apparatus proximal the substantially closed end, and using the introduced flow of liquid to transport aquatic animals contained in the apparatus, out of the open end 102a of the apparatus.一種用於從其容納水生動物的一個設備102來提取水生動物的方法。該設備係具有一個本體,其具有一個開放端102a、一個實質閉合端102b、與在該開放端和實質閉合端之間的一個或多個側壁102c。該(等)側壁的至少一個主要部分係形式為一個可撓的薄膜,且該(等)側壁的至少一個主要部分與該實質閉合端係實質不能滲透水。該種方法係涉及:將該設備的開放端102a定位為高於該設備的實質閉合端102b而配置該設備;將一個液流引入到其接近該實質閉合端之設備的一個內部區域;且,使用該引入液流以將其容納在該設備中的水生動物運送離開該設備的開放端102a。