LOUISE MURRAY / SCIENCE PHOTO LIBRARY LOUISE MURRAY / SCIENCE PHOTO LIBRARY
Dugong (Dugong dugong). This aquatic mammal is found in groups throughout shallow waters of the South Pacific and Indian oceans. It is related to the manatee but is smaller, reaching a length of less than 3 metres. Also known as sea cows, dugongs graze on sea grasses and are mainly herbivorous. They can live for up to 70 years.
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