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This is Scientific American 60-second science. I'm Emily Schweng.

Some ocean animals have a clever form of camouflage. They're transparent, but being see-through is far less common on land.

And there's a few reasons why that might be.

Jim Barnett is a postdoctoral research fellow at McMaster University in Ontario, Canada.

Differences between air and water as the surrounding medium means that light interacts differently

with the transparent organisms, body tissues. In the ocean, light is always coming from above

and the background is less variable. But in jungle canopies, light is coming from all over the

place and the background is far more variable. Enter a little critter called the Glass Frog. It's not

actually transparent. It's translucent. That means its skin in some places is thin enough

that you can actually see its internal organs hard at work.

Most of the time when you see photographs of these frogs, they're taken under quite controlled conditions

with either strong lighting or like a powerful flash or they're photographed from underneath on a piece of glass.

And it's really their bellies which are transparent.

And these frogs are pretty small and thin and quite delicate. So if you have a powerful

flash on your camera, you can sort of just blast light through them, and they will look pretty

transparent. Barnett says the frog's translucent skin is actually a novel camouflage strategy that no one's ever really studied until now.

What we think is happening is that light is traveling through the frog, interacting with the pigmentation,

...