MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY
Whale sonar. Artwork of the sonar mechanism used by whales to detect their prey (squid, far right). The waveform across bottom (yellow) shows the pulses of sonar (grey cone) sent out from the whale's head. The echoes are also shown returning from the squid, and show up on the waveform as the smaller peaks. Whales are marine mammals found throughout the world's oceans.
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