They announced the death reasons two days later : one was wounded to death by propellers , while the other suffered a sudden death due to electrofishing or other man-made causes .
两天后，水生所发布消息说，一头江豚是遭螺旋桨击伤致死，另一头则疑为电捕鱼或其他原因导致猝死。
This team patrolled the waters like aquatic ghostbusters sporting electrofishing backpacks and using electrodes to stun the fish before transferring them to an oxygenated tank .
