I interviewed at Bi-Mart (Madras, OR) in September 2016. The interview lasted about 25 min and was extremely laid back. He spent more time talking about Bi-marts operations and friendly, for the employee, work place then anything else.
Confidence votes 13. Whales, like otters, porpoises, and all other swimming mammals, undulate their spines rhythmically, waving their tails and flipping the flukes at the end, propelling them forward.
The clicks hit an object and bounce back to the whale's throat and jaw and then up to the ear. The echos of the clicks and the time it takes them to return gives the whale a sound map of what surrounds it. (Click here to view a spectrogram of this click train.).