Websites, news and documents on Marine Mammals are available under Related Knowledge of this Topic. For details of the location of marine mammals, please go to the Ocean Biogeographic Information System (OBIS).
Photo title: Humpback whale breaching
Photo credit: NOAA Fisheries
Photo title: Endangered Hector's Dolphin, New Zealand
Photo credit: Royal Forest and Bird Protection Society www.forestandbird.org.nz
Dolphins Use Double Sonar: Researchers Discover That Dolphins Can Generate Two Sound Beam Projections Simultaneously
by Lund University / ScienceDaily
08 June 2011
Dolphins and porpoises use echolocation for hunting and orientation -- by sending out high-frequency sound, known as ultrasound, dolphins can use the echoes to determine what type of object the sound beam has hit.
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