Like sharks, whales and dolphins are perfectly evolved for ocean - TopicsExpress

Like sharks, whales and dolphins are perfectly evolved for ocean life. They have evolved tail structures that allow them to swim long distances, highly efficient lungs to support the air-breathing mammals on their dives, and unique hearing adaptations that allow them to hear well underwater. Ears do not have direct connections to the outside world like humans do. In baleen whales waxy plugs operate to block the inner ear from water. Also toothed whales have oil filled sinuses to detect sound waves and transmit them to the inner ear. However, evolution never accounted for noise as loud as sonar and seismic air guns, meaning these intense noise sources can overwhelm a whale and cause serious harm. #WhaleWeek

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