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通过静水、动水竹片置螺定床、动床置螺和光照定床置螺试验，观察不同流速、不同深度水体中钉螺的运动（活动）规律。结果表明，钉螺的运动以爬行为主要方式。无论在静水或动水中，钉螺必须依附物体爬行。在静水中有的钉螺爬至水面翻身悬浮，且可借助厣的开合微微摆动，每小时移动距离为1cm；其悬浮水面的时间长短与钉螺级别有关。钉螺在静水和低流速水体中的活动，表现出无方向选择性。随着流速增加，其方向选择性渐趋明显。当水流速度为25～30cm／s时，钉螺只向上游，包括左右侧上游爬行，大于30cm／s时，停止爬行。水体中的钉螺仍有超光性和背光性。
The law of motion (activity) of snails in water body at different flow velocities and depths was observed by means of static water, setting screw-fixing bed with moving water and bamboo-fixing bed, moving bed fixing screw and light fixing bed screw-in test. The results show that the snail movement to crawl as the main way. Snails must be attached to objects to crawl, whether in still or moving water. In the still water, some snails climb to the water to stand up and levitate, and can be opened and closed with the help of a slight swing, the hourly movement of 1cm; the length of time suspended in water and snail-related. Snail activity in still and low-flow waters showed no directional selectivity. As the velocity increases, the direction selectivity becomes obvious. When the water flow rate of 25 ~ 30cm / s, snail only upstream, including the left and right side of the upstream crawling, more than 30cm / s, to stop crawling. Snails in water are still ultra-light and backlighting.