00:00Rare, marine mammals navigate remote waters and vanishing habitats.
00:05A vaquita surfaces beside a fishing boat in Mexico's Gulf of California.
00:10Rare, marine mammals move through remote seas, deep trenches, cold coasts, and vanishing habitats.
00:17Vaquitas surface in the northern Gulf of California, and fewer than two dozen may remain in the wild.
00:23Spade-toothed whales dive through South Pacific waters, and scientists have almost never seen living adults at sea.
00:31Hooded seals inflate black nose balloons on North Atlantic ice, and males use the strange display during breeding season.
00:39Narwhals swim under Arctic ice with long, spiral tusks, and males can carry tusks longer than a kayak.
00:47Dugongs graze slowly through Indian Ocean seagrass beds, scraping underwater meadows with bristled mouths.
00:54Amazon river dolphins roll through muddy South American rivers, where pink bodies and long beaks surface near flooded forests.
01:02Siamie-ringed seals rest on Finnish lake ice, and snow caves shelter pups during harsh northern winters.
01:09Stellar sea cows once grazed kelp forests near the Commander Islands, before hunters erased the giant mammals in the 1700s.
01:16Hector's dolphins dart through New Zealand coastal waves, showing rounded dorsal fins as small groups chase fish.
01:24Bowhead whales break Arctic water with massive skulls, and some individuals can live longer than two centuries.
01:31Vaquitas, narwhals, dugongs, river dolphins, and ringed seals reveal strange bodies shaped by very specific waters.
01:39A tiny vaquita fin slicing gray water can show how rare ocean life can disappear from view.
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