Because some sounds travel very well through water.
By using their sonar
yes they can
5 miles
Infrasounds
It varies widely. In some cases a tornado can be heard over a mile away, in other cases you can't hear it until it's just about on top of you.
From 10 meters away .
dolphins are not called killer whales or if they are its because there far away and carnt see properly
200 kHz
"Hear" They can HEAR something up to 5 miles away
a lynx can hear a prey from 65 metres away
almost instantly.
25 miles away
ultrasonic
2 miles
yes they can, they can actually hear people from really far away
Possibly up to a mile or two away.