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.
Humpback whales also use their long pectoral fins for communication, in both aggressive and defensive behaviour. Pec-slapping, is where the whale lies on its side and slaps its long pectoral flippers on the surface of the water, producing an audible crack. Pec-slapping can be used gently between courting animals or more aggressively between males competing for a female.