Blue Whale
Blue Whale
Canadian Museum of Nature
Natural History Notebook
Where are they found? Arctic Ocean, Atlantic Ocean, Indian Ocean, Pacific Ocean, Southern Ocean
The largest creature ever known to have existed on Earth is the present-day blue whale. Today's blue whale is even larger than its prehistoric ancestors, reaching a total length of 30 m (100 ft.) and a weight of 136 t (150 tn.). Adult female blue whales are larger than adult males. The blue whale's heart alone is the size of a small car! Even the largest dinosaur weighed only about 18 t (20 tn.), although it probably reached 40 m (131 ft.) in length.
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