Scanning for fish, it hovers like a hummingbird... 寻找鱼类时 它们像蜂鸟一样
Their keen vision means they can spot a ball of fish a mile away. 敏锐的视力 令其能在1.6公里外发现鱼群
countless new kinds of fish also evolved. 无数种新的鱼类也进化了
But these fish also have another game-changing adaptation... 但这些鱼 还有另一种极为重要的适应性
they are different to those of other fish. 叶鳍与其他鱼的鳍不同
and a new type of fish was thriving, 一种新型鱼类蓬勃发展