From sea lions to killer whales (and even polar bears), there's a great diversity of marine mammals living across Earth's oceans. At Live Science, we guide you through the underwater worlds of our marine relatives with the latest news, features and articles, so whether our expert writers and editors are explaining why deep-diving mammals don't black out or reporting on a gray whale breaking the mammal migration record, you'll always have interesting marine mammal facts to read.
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Ancient predatory whale with big eyes and razor-sharp teeth was 'deceptively cute'
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No, blue whales aren't going silent off California. Here's why.
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Watch a pod of orcas pretending to drown one of their own in macabre training session
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Ancient whale 'graveyard' discovered under melting Russian glacier
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Wild orcas offer humans food. Could they be trying to make friends — or manipulate us?
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Dwarf sperm whale: The 'pint-size whales' that gush gallons of intestinal fluid when surprised
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Still frame from video footage recorded in the Kvænangen fjords, Norway, in 2024, showing the tongue-nibbling interaction between two free-ranging killer whales.
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Watch a pod of orcas pretending to drown one of their own in macabre training session
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Wild orcas offer humans food. Could they be trying to make friends — or manipulate us?
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Still frame from video footage recorded in the Kvænangen fjords, Norway, in 2024, showing the tongue-nibbling interaction between two free-ranging killer whales.
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Salmon-hat wearing orcas also give each other massages with kelp, scientists discover
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Living lunch box? Iceland orcas are unexpectedly swimming with baby pilot whales, but it's unclear why.
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'Incredible and rare' sight as endangered whale attacked by 60 orcas in brutal hunt
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Dolphins: Facts about the intelligent marine mammals that use tools to hunt
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Orcas off Antarctica filmed teaching calves to hunt in incredible new footage
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Orcas: Facts about killer whales
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Groovy! Dancing Sea Lion Keeps a Beat
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Swarm of rainbow-colored starfish devour sea lion corpse on seafloor
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No one knows why decapitated sea lions keep turning up in Vancouver Island
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Terrifying Video: Why a Sea Lion Pulled a Little Girl into the Water
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OpinionSea Lion 'Aerospace': High-Thrust, Low Wake
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No Tusks: Ancient Walrus Cousin Looked More Like a Sea Lion
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OpinionAutopsies from Space: Who Killed the Sea Lions?
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Sea Lions React To Sonar
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Sea Lion Species Removed from Endangered Species List
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Groovy! Dancing Sea Lion Keeps a Beat
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Swarm of rainbow-colored starfish devour sea lion corpse on seafloor
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No one knows why decapitated sea lions keep turning up in Vancouver Island
-
Terrifying Video: Why a Sea Lion Pulled a Little Girl into the Water
-
Opinion
Sea Lion 'Aerospace': High-Thrust, Low Wake
-
No Tusks: Ancient Walrus Cousin Looked More Like a Sea Lion
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Opinion
Autopsies from Space: Who Killed the Sea Lions?
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Sea Lions React To Sonar
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Sea Lion Species Removed from Endangered Species List
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Rabid seals are attacking people in South Africa
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Bird flu wipes out over 95% of southern elephant seal pups in 'catastrophic' mass death
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Mystery mass death of seals on remote, uninhabited Siberian island under investigation
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World's rarest seals have a secret breeding cave in Cyprus
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Seals are making 'Star Wars' noises at each other underwater, and we have no idea why
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Eerie seal 'ballet' beneath Antarctic iceberg wins underwater photo prize
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Seal caught clapping underwater … and scientists flip out
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A Seal Has Taken Up Residence in Manhattan, and Its Human Neighbors Are Thrilled
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Dozens of Seals Turn Up on Icy Streets in Canada. Here's Why.
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Ancient predatory whale with big eyes and razor-sharp teeth was 'deceptively cute'
-
No, blue whales aren't going silent off California. Here's why.
-
Ancient whale 'graveyard' discovered under melting Russian glacier
-
Dwarf sperm whale: The 'pint-size whales' that gush gallons of intestinal fluid when surprised
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Whales: Facts about the largest animals on Earth
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'I thought I was dead': Terrifying video of humpback whale gobbling up kayaker explained
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These endangered whales can live up to 150 years — twice as long as previously thought
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Male humpback whale crossed 3 oceans for sex, inadvertently breaking distance record for species
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Mysterious sound coming from the Mariana Trench has finally been explained
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Still frame from video footage recorded in the Kvænangen fjords, Norway, in 2024, showing the tongue-nibbling interaction between two free-ranging killer whales.
-
Salmon-hat wearing orcas also give each other massages with kelp, scientists discover
-
Living lunch box? Iceland orcas are unexpectedly swimming with baby pilot whales, but it's unclear why.
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