PHOTOS & VIDEOS
Jellyfish In Action
Comb jellies are found in coastal waters from Cape Cod to the Carolinas. They are invasive to the Black Sea. These jellies are semitransparent but refract sunlight, which makes them appear to have rainbows running down their bodies. They can also make their own light (bioluminescence). They can flash their own light when disturbed. Watch the video above to see the comb jellies in action.
To learn why the jellyfish population is on the rise, read the December 13, 2013 issue of TIME For Kids.
Video provided by the National Aquarium.