Since his birth Mara has raised Kell in this safe place, away from other whales.
从诞生起，玛拉就在这个安全的地方抚养凯尔，远离其它鲸鱼。
But now he has a rival for his mother's attention. A young male humpback.
但现在，它有一名竞争者争夺母亲的注意。一头年轻的雄鲸。
This visitor is a sure signal that their time here is coming to an end.
这位拜访者的出现意味着它们待在这里的时间即将结束。
Soon they will rejoin the others.
不久，它们将加入其它鲸群。
The young male is looking for a mate, but Mara will not be ready again until next season.
这头年轻的雄鲸正在寻找配偶，但是玛拉还没有准备好，必须等到下个季节。
That still doesn't stop him showing interest.
但这阻止不了它表现出兴趣。
It is only because no larger males are nearby that this young one dares to follow her.
只因为没有其它大的雄鲸在附近，因此这头年轻的雄鲸才敢跟着它。
Last season, when Kell was conceived, it was very different... The males competed fiercely to mate.
上个季节，当怀着凯尔时，非常不同。雄鲸激烈竞争配偶。
As many as twenty followed her, fighting to be at her side. She attracted the very largest males.
多达二十头雄鲸跟着它，抢着跟在它旁边。它吸引了最大的雄鲸。
The closest one had the best chance of mating, but he had to defend his position.
最靠近它的才有最佳的交配机会，但它必须捍卫它的位置。
The once peaceful singers battled violently for supremacy.
曾经是和平的歌唱家激烈争夺最高地位。
This is the final lesson Kell must learn, if he is to father his own young: he will have to become a fighter.
这是最后的功课，凯尔必须学会，想要成为父亲有自己的后代，它必须成为战士。
His first chance to mate may not come for another twelve years, when he is fully grown.
它的第一次交配机会必须再等待十二年，当它完全长大时。
Only size will give him the strength to push rivals away.
只有体型能给它力量，赶走竞争者。
The battles between the males lasted for hours. They were immense tests of strength.
战斗在雄鲸之间持续了好几个小时。这是对力量的巨大考验。
And then...with Mara in front, and his rivals falling behind, the closest male had one final trick.
然后，玛拉在前面，竞争者们落在后面，最近的雄鲸施展最后的计谋。
He blew a curtain of bubbles, stretching the length of the sea, to screen her from the other males.
它吹出气泡帷幕，延长海的长度，把玛拉与其它雄鲸隔开。
The males battled all day, but in the end it was Mara who made the choice...and conceived her white whale.
雄鲸战斗整天，但最后由玛拉决定，怀上它的白座头鲸。
It's been four months since Kell was born.
凯尔出生四个月了。
Mara is now starved and tired. And she can see that he is restless...
玛拉现在又饿又累。玛拉看到它烦躁不安。
This is her signal. It's time to leave their nursery.
这是它的信号。该离开肓儿所了。