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  • Cold currents are sweeping along

  • the coast of Florida.

  • And with them come grey mullet,

  • on their migration to their spawning grounds in the south.

  • Millions of them,

  • and packed so tightly,

  • they stay in the water

  • like an oil slick.

  • Few people on the beach

  • are even aware of them.

  • The mullet keep as close

  • to the shore as possible.

  • For in deeper water,

  • there are predators.

  • Close to the beach,

  • they have to keep clear

  • of human swimmers.

  • But now, hunters from the open ocean

  • have detected them.

  • Tarpon, over two metres long

  • and weighing over 100kg.

  • To get close to the mullet in the shallows,

  • the tarpon turn on their sides.

  • Now the mullet can't see

  • their shining, silver flanks

  • until it's too late.

  • And feasting begins.

  • Blacktip shark arrive.

  • Pelicans join in.

  • But these attacks have little effect

  • on the immense shoals.

  • The mullet outnumber their enemies

  • by 10,000 to one.

  • So the great procession travels on

  • into the northern Atlantic Ocean,

  • where, at last, they will be able

  • to spawn in safety.

Cold currents are sweeping along

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B2 中高級

鯊魚吞噬了一牆之隔的鯔魚 - 七個世界,一個星球|BBC Earth (Shark devours wall of mullets - Seven Worlds, One Planet | BBC Earth)

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    林宜悉 發佈於 2021 年 01 月 14 日
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