CRAIG K. LORENZ / SCIENCE PHOTO LIBRARY CRAIG K. LORENZ / SCIENCE PHOTO LIBRARY
Northern Elephant Seals (Mirounga angustirostris) are the largest pinnipeds in the northern hemisphere. The males can weigh over 5,000 pounds and are up to 16 feet long. They have short, course grey or brown fur and a very thick blubber layer that insulates them from cold water. They dive to depths of 300 ft or deeper and most dives are 20 to 30 minutes long. Elephant seals remain at sea for 6 to 8 months, traveling thousands of miles and spending 86 percent of their time submerged. San Simeon, Ca.
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