..and their range is expanding again. 它们的活动范围开始扩大
..hitting top speed with just five swipes of their tails. 只需摆动五次尾鳍就能达到最高速度
seals risk their lives every time they set out to eat. 海豹每次前去觅食都要冒着生命危险
It's here that they meet their explosive end. 带着巨大能量扑向此处
Crabs now make their burrows directly beneath the beach lights 螃蟹将巢穴直接建在沙滩灯光下
and wait for their prey to come to them. 等猎物自己送上门
Their instinct is to reach the sea as quickly as possible. 本能驱使它们尽快爬到海里