these fish are balled together for protection. 这些鱼聚集在一起以寻求保护

320. With many also boasting size and strength,
     许多鲨鱼也拥有体型及力量优势
321. they are as close to perfection as an ocean predator can get.
     是近乎完美的海洋捕食者
322. In the sea off Western Australia,
     在西澳大利亚海域
323. these fish are balled together for protection.
     这些鱼聚集在一起以寻求保护
324. But the sharks hold back...
     但鲨鱼暂时按兵不动
325. because they have a special plan of attack.
     因为它们有一个特别的进攻计划
326. Appearing to work as a team,
     鲨鱼采取团队作战

来自《我们星球上的生命 第一季 第二集 Life on Our Planet S01E02 第一前线》第 323 行