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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

Sea otters are pretty petite compared to other marine mammals, which means that despite their furry coats, they tend to lose heat quickly, and they need lots of energy to stay warm.

So they need to eat about 25% of their body weight every day.

Sarah McKay Strobel, a sensory ecologist at UC Santa Cruz.

So we know they have to eat that much, but in order to eat that much food, that means

that sea otters have to find all of that food, and that's where we commence.

She and her team analyzed the otter's senses to solve the mystery of how they're such

efficient foragers.

Vision isn't reliable, she says.

It's pretty dark and murky underwater, and crabs and clams tend to hide.

Hearing is also tough for otters in the noisy underwater environment,

and sniffing is no good either.

And they're underwater, they're holding their breath.

But what's left is touch, So Strobel and her team measured the

sensitivity of otter's paws and whiskers. They blindfolded an otter named Selka and then presented

her with plastic plates engraved with tiny grooves, kind of like corduroy. Selka's job was to choose

the plate with two millimeter grooves, which she'd been trained to associate with a tasty shrimp,

...