in a period known as the Devonian,
进入泥盆纪时期
there was to be a changing of the guard.
即将发生权力转移
to perfectly mimic a female.
完美地模仿一只雌性
With neither backing down, a fight is inevitable...
双方都不退让 争斗无可避免
as a new male enters the arena...
又有一只雄性进入竞技场
this is a young giant cuttlefish.
这是一只年轻的巨型墨鱼
he's come to the shallows in search of a mate.
它来到浅海求偶
now was a chance to head back up.
现在有机会回到浅海
Within a few more, it had entirely gone.
又过了几千年 冰完全消失
Within a few millennia,
在几千年内