The Kid Should See This

Do fish biofluoresce in Greenland’s icy waters?

Watch more with these video collections:

Are there fluorescent animals in places on the planet where there’s zero light half the year (polar night) and 24 hours of light (midnight sun) during the other half of the year? This question over coffee in New York City led to a freezing and surprising trip to the edge of the Arctic Circle. From the American Museum of Natural History:

Diving into the freezing, iceberg-filled waters of Greenland is by itself an adventure, but Museum Curator John Sparks and Research Associate David Gruber recently embarked on an ambitious expedition to find biofluorescent fish in the region’s remote waters. Biofluorescence, the ability to convert blue light into green, red, or yellow light, is well documented in tropical fish who live in regions where there’s even daylight year-round. But in Greenland, where days can be incredibly long or incredibly short, researchers were interested in seeing first-hand how long periods of darkness affected local fishes’ ability to biofluoresce.

For example, would the traditionally-fluorescing scorpionfish (Scorpaenopsis papuensis) fluoresce in an ecosystem with these unusual lighting conditions? Sparks explains, “We both didn’t know what to expect.”

diving in greenland
Watch Exploring Greenland’s Icy Waters at

scuba diving
Then watch this next: The Difference Between Bioluminescence and Fluorescence.

And enjoy more videos about things that glow, including a “glowing” biofluorescent hawksbill sea turtle, Scorpions in the Bay Area, and The Case of the Green-Eyed Squid.

This award-winning video collection is reader-supported. Become a sustaining member to keep TKSST online and free for everyone, including teachers and parents who use it as a resource to spark learning and curiosity for kids.

🌈 Watch these videos next...

The dazzling fluorescent colors of corals under actinic lights

Rion Nakaya

How NASA sees photosynthesis from space + TMBG’s Photosynthesis

Rion Nakaya

Discovered! A “glowing” biofluorescent hawksbill sea turtle

Rion Nakaya

BBC Oceans: Underwater fluorescence

Rion Nakaya

Slow Life: Incredible macro video of fluorescing corals & sponges

Rion Nakaya

Scorpion evolution, scorpion moms, & glowing scorpions

Rion Nakaya

…meanwhile…: Marine life in high magnification time lapse

Rion Nakaya

The case of the green-eyed squid

Rion Nakaya

The Difference Between Bioluminescence and Fluorescence

Rion Nakaya

Get smart curated videos delivered every week.