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Science Quickly

Snail's Venom Puts Fish in Insulin Coma

Science Quickly

Scientific American

Science

4.31.4K Ratings

🗓️ 26 January 2015

⏱️ 2 minutes

🧾️ Download transcript

Summary

The cone snail's venom contains not only neurotoxins, but insulin, too—which stuns the fish it preys on. Christopher Intagliata reports

Transcript

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0:00.0

This is Scientific American 60 Second Science.

0:04.4

I'm Christopher in D'Artata.

0:05.8

Got a minute?

0:07.8

It may not be the legendary matchup Squid versus Octopus, but imagine this fight.

0:12.4

Sea-dwelling cone snail versus tiny fish.

0:15.6

Who wins?

0:16.7

Well, true, the fish can dart away.

0:19.3

But the snail has chemical weapons.

0:21.4

So they use a whole cocktail of compounds and most of them are

0:25.4

neurotoxins and they just completely wipe out the prey's physiology right so the

0:31.6

prey cannot respond anymore.

0:33.0

Helen Asafavi, a biologist at the University of Utah.

0:36.0

She and her colleagues discovered that the cone snail's venom contains not only neurotoxins, but

0:41.6

insulin too, which the snail's prey taken through their gills.

0:45.8

And that insulin overdose causes the fish's blood sugar to plummet, depriving its brain of energy

0:50.5

and inducing a coma.

0:52.0

And that's what happens when you give people an insulin overdose.

0:56.0

You can cause coma and then death,

0:59.0

depending on the amount of insulin.

1:01.0

They report the findings in the journal Proceedings

1:03.8

of the National Academy of Sciences.

1:06.2

If this all sounds like something out of a murder mystery,

...

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