because they send like a wave out and it comes back if there is a another fish or attacker coming
Dolphins danger is sharks because they eat the dolphin
Yes
No They Dont
hyenas can sense dangers from a mile away
Dolphins hide from sharks and dolphins can also sense danger.
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hearing
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Dolphins
that doesn't make any sense plus the dolphins disapeared!(see "Hitchikers Guide To The Galaxy")
Dolphins smell all fishy sense they live in the ocean all the time. Dolphins also smell like salt water.
this question doesn't make any sense.