Fishermen say shark numbers are on the rise, but marine scientists say while there have been more sightings it is unclear whether there are more sharks off Sydney.

• 渔民都说鲨鱼的数目正在上升，但是海科学家们表示尽管鲨鱼多次露面，但是不能肯定悉尼海域的鲨鱼数目有所增加。