Marine Mammals
Aquatic mammals such as whales and dolphins live and feed in the ocean. The Blue Whale is the biggest mammal on Earth.
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Leopard seals are the second largest species of seal in the Antarctic after the southern elephant seal. They're fast, powerful and eat basically anything that moves. Their only natural predator? The killer whale.
The adorable vaquita, the world's smallest porpoise and rarest marine mammal, has been pushed to virtual extinction by greed and fishing nets.
By Katie Carman
Humpback whales can be as long as a city bus and weigh as much as two. They love to breach and water slap with their fins and tails, making them a perennial favorite for whale watchers.
By Katie Carman
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Sperm whales are one of the largest creatures in the ocean. And they have the biggest brain on the planet. So are they also the smartest? We'll tell you.
By Wendy Bowman
Their mamas may be the only ones who can tell them apart, but there are major differences between these cousins, one being the type of water in which they can survive.
Seals have long been known as dry-land clappers, but the first-ever percussive clapping observed by scientists has blown seal clapping theory out of the water. Or should we say under the water?
Sea otters are adorable, back from the brink of extinction and will totally bite you.
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Manatees are so gentle and sweet they'll break your heart, but in 2021, there have been more manatee deaths than in any year in previously recorded history. Why are these gentle giants dying in such unprecedented numbers?
It is the largest animal ever to exist on the planet.
A dolphin doesn't breathe automatically, so during sleep, one side of its brain stays awake to ensure the mammal rises to the surface and breathes.
By Loraine Fick
Penguins stand for months on the coldest ice in the world without their feet freezing, thanks to special blood circulation.
By Loraine Fick
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It looks excruciating, and nobody knows exactly why it happens.
Do humpback whales get tired of singing the same old song, or do they simply start over when it gets too complicated?
A new study paints a grave future for the killer whale, all because of the now-banned chemicals polychlopinated biphenyls — PCBs.
A dolphin named Billie learned a dolphin-show trick from some captive dolphins, taught her wild friends how to do it and started a fad.
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Breaking news: Dolphins and porpoises don't actually look very much alike.
The platypus may look a bit absurd and bizarre, but its milk might hold the secret to fighting antibiotic-resistant bacteria.
Thanks to the excesses of narcoterrorist Pablo Escobar, Colombian waterways now house a population of these invasive African giants.
It's the first evidence researchers have of the whales using their "unicorn horns" to capture prey.
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It turns out that one of the world's most enchanting animals has even stronger superpowers than we previously knew. Surprise!
If a massive whale washed up on your beachfront, you'd think that the bulk of the problem would be ... well, its bulk. But if you were covered in decomposing whale guts, you'd think differently.
Whether you're sleeping on a water bed or napping during a rainstorm, water has a calming effect. Walruses also make use of soothing waves, but why don't they drown when catching submerged shut-eye?
If you don't make it past that first "E" during your annual vision test, you might give bats a reprieve by calling yourself "blind as a manatee."
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Vindictive whales like Moby Dick sometimes give these giants of the sea a bad rap. But whales do a lot for their ecosystem, especially after they go to Davy Jones' locker.
What? You've never heard of a narwhal? Well, it's a cold-water-dwelling, deep-diving, vocalizing, halibut-munching wonder with its very own ivory crown. Did we mention its crazy tusk?