Arctic krill response to light (IMAGE)

University of Delaware

Arctic krill response to light

Caption

Diffuse sunlight, moonlight, aurora, and artificial light can all be seen during the Arctic Polar night, including near Kongsfjorden, Svalbard. Svalbard is an archipelago northeast of Greenland. When it is lightest in the Arctic polar night, usually around the middle of the day known as midday twilight, Arctic krill (inset) know to swim down to the bottom in order to hide from predators. When it is darkest in the Arctic polar night, they swim to the surface in search of bioluminescent food.

Credit

Photo by Geir Johnsen | Photo illustration by Tammy Beeson

Usage Restrictions

No restrictions.

License

Public Domain

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