naturebriefs
Life

Fish & sea life

44
briefs
9:37
average
423 min
in total
All briefs44
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8:27

Rogue wave

Rogue waves are not myths—they’re daily, dangerous, and defined: double the sea’s average big waves.
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9:10

Beluga whale

A whale built for ice—not open water, not warmth, not speed—but for slipping, listening, and vanishing beneath it.
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7:44

Clownfish

A fish that turned poison into property—and made the anemone its landlord, bodyguard, and nursery.
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8:00

Cuttlefish

The cuttlefish is intelligence without memory — a two-year burst of problem-solving, deception, and learning before vanishing.
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10:06

Dugong

The dugong is the only sirenian that grazes seagrass like a marine lawnmower—and the only one left standing after we wiped out its entire family.
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7:45

Flying fish

Gliding is just leaping with better geometry—and it only works because flying fish stopped evolving anything else.
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8:58

Sea cucumber

It liquefies its own body to vanish into the seabed — then reappears as dinner in Tokyo, Jakarta, and Port Louis.
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11:02

Sperm whale

The loudest, deepest, brainiest predator on Earth — and it hunts in total darkness, alone or in matriarchal silence.
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9:28

Salmon run

A magnetic compass and a childhood smell—salmon don’t navigate home with instinct. They navigate with physics and memory.
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9:29

Sardine run

A cold-water reproductive sprint—not a drift, not a fluke, but a tightly timed genetic imperative along South Africa’s east coast.