Nematocyst Discharge

This cell is one of thousands on the tentacles of this starlet sea anemone and other cnidarians, including hydra and jellyfish. These cells contain poison darts that sting with as much impact as a speeding bullet (0:04)

None

Latest Videos

Preview thumbnail for video'Ask Smithsonian: Does Chicken Soup Really Help With a Cold?
Ask Smithsonian: Does Chicken Soup Really Help With a Cold? (1:16)
Preview thumbnail for video'The Surprising Culprit Threatening Yellowstone’s Grizzly Bears
The Surprising Culprit Threatening Yellowstone’s Grizzly Bears (3:17)
Preview thumbnail for video'How Were Easter Island's Gigantic Statues Actually Carved?
How Were Easter Island's Gigantic Statues Actually Carved? (4:11)
Preview thumbnail for video'Ask Smithsonian: How Do Noise-Canceling Headphones Work?
Ask Smithsonian: How Do Noise-Canceling Headphones Work? (1:13)
Preview thumbnail for video'How a Single Asteroid Wiped Dinosaurs Off This Planet
How a Single Asteroid Wiped Dinosaurs Off This Planet (1:14)
Preview thumbnail for video'A Look Inside This See-Through Frog
A Look Inside This See-Through Frog (1:01)
Preview thumbnail for video'Who Decided to Put 60 Seconds in a Minute?
Who Decided to Put 60 Seconds in a Minute? (2:33)
Preview thumbnail for video'Ask Smithsonian: Why Don’t People Smile in Old Photographs?
Ask Smithsonian: Why Don’t People Smile in Old Photographs? (1:12)
Preview thumbnail for video'America's First Multimillionaire
America's First Multimillionaire (2:46)