What hunting tactics do polar bears use to surprise a seal?
they hide behind rocks
they bury in snow
they approach diving
they pretend being dead
A resting seal would try to escape to the sea when attacked (where it easily outswim a polar bear), so the attack from the sea is a very efficient hunting strategy. Polar bears are able to dive to a depth of 15 feet and remain submerged for up to two minutes. 
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they hide behind rocks
they bury in snow
they approach diving
they pretend being dead
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