Jellyfish predate dinosaurs. How have they survived so long? - David Gruber
View full lesson: http://ed.ted.com/lessons/jellyfish-predate-dinosaurs-how-have-they-survived-so-long-david-gruber Some are longer than a blue whale. Others are barely larger than a grain...
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Some are longer than a blue whale. Others are barely larger than a grain of sand. One species unleashes one of the most deadly venoms on Earth. Another holds a secret that's behind some of the greatest breakthroughs in biology. They've inhabited the ocean for at least half a billion years, and they're still flourishing as the sea changes around them. Jellyfish are soft-bodied sea creatures that aren't really fish. They're part of a diverse team of gelatinous zooplankton, zooplankton being animals that drift in the ocean. There are more than 1,000 species of jellyfish, and many others that are often mistaken for them. A noted feature of jellyfish is a translucent bell made of a soft delicate material called mesoglea. Sandwiched betw...
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Some are longer than a blue whale. Others are barely larger than a grain of sand. One species unleashes one of the most deadly venoms on Earth. Another holds a secret that's behind some of the greatest breakthroughs in biology. They've inhabited the ocean for at least half a billion years, and they're still flourishing as the sea changes around them. Jellyfish are soft-bodied sea creatures that aren't really fish. They're part of a diverse team of gelatinous zooplankton, zooplankton being animals that drift in the ocean. There are more than 1,000 species of jellyfish, and many others that are often mistaken for them. A noted feature of jellyfish is a translucent bell made of a soft delicate material called mesoglea. Sandwiched betw...
