Hearing under water is easy, although speaking under water is difficult. Water conducts sound quite well, better than air does, in fact.
they can hear better out of the water
Yes, you can hear under water.
This is the same as asking if you can hear under water and yes, you can hear under water.
Yes.
the hear really well under water and on land
yes they can. It is muffled, like when someone talks when we are under water, but they can hear it! no,when we are under water and alive with senses in our brain to detect and compare, is assumed we hear,but for a baby that is not yet born, can't hear anything
sonar
yes. go underwater in a pool and ask someone to talk and you will be able to hear them talking. I am not sure if you can hear under water in the ocean though.
Yes
People hear better under water because there aren't as many sound particles in the water so u can hear everything better
as long as they want until they need to spout the water
they have a trunk that sucks up water that has absorbed the words and the trunk leads to he brain so that amphibians can hear! WOOP, IM CLEVER!!!! ;D