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When their new armour has hardened,
當新殼變硬
the crabs return to the comparative safety of the deep,
蜘蛛蟹就回到較安全的海底
leaving behind only their old, empty shells.
只留下它們褪下的舊空殼
Like spider crabs, the behaviour of most marine creatures
跟蜘蛛蟹一樣 多數海洋動物的行為
is controlled by a very simple nervous system.
都是由簡單的神經系統(tǒng)控制
But there are exceptions.
但還是有例外
This cuttlefish is one of the cleverest animals in the ocean.
這只烏賊 是最聰明的海洋動物之一
She has a very large brain.
這只母烏賊有很大的腦部
In fact, it's larger for her size
根據身體比例
than that of most fish or reptiles.
它的腦部 比多數魚類或爬蟲類更大
Her life is both complex and full of intrigue.
它的生活不只復雜，更充滿謎題
Giant Australian cuttlefish usually live alone,
澳洲巨烏賊通常獨來獨往
but once in their short lives they must come together to mate.
但在短暫的生命中 它們必須聚集一次進行交配
