but the tuna must be wary. 金枪鱼必须机警地远离鲸鲨

26. It has taken a vast mouthful of the baitfish itself.
    鲸鲨张开大口,满嘴都是饵鱼
27. Plankton, it seems, is not the only food for a whale shark.
    浮游生物看来并不是鲸鲨的唯一食物
28. Both shark and tuna feast together
    鲸鲨和金枪鱼一起享受这大餐
29. but the tuna must be wary.
    金枪鱼必须机警地远离鲸鲨
30. Even they can end up in the whale shark's stomach.
    除非它们想成为鲸鲨的腹中美餐
31. Predators here must grab what they can, when they can
    掠食者在这里想怎么吃就怎么吃
32. for such events do not last long.
    因为好事不多,好景不长

来自《行星地球 第一季 第十一集 Planet Earth S01E11 海洋深处》第 29 行