英语听力：自然百科 大迁徙 Great Migrations—13

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Having dipped in the ocean to renew themselves, the bright-red would-be mothers seek out the males. Once entwined, the tangle⁴ may last half an hour. When she is ready, the female disengages and descends⁵ into her den⁶. The male, duty done, begins the long trek⁷ back to the forest. But for the female, the odyssey⁸ has just begun. 

 

In darkness, she produces up to 100,000 glistening⁹ eggs and broods them for 12 or 13 days, waiting for the cue that drives her entire migration¹⁰, the waning¹¹ moon and the resulting mild tides. 

 

Eggs stowed in abdominal¹² sacs, the females make a clattering¹³ dash to the sea. Here on the moonlit beaches of their own birth, they brace¹⁴ themselves at the water's edge and release their offspring in an antic dance born of instinct and desperation.

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