Jellyfish - Wikipedia
Jellyfish, also known as sea jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals, although a few are anchored to the seabed by stalks rather
Jellyfish | Characteristics, Habitat, Diet, Anatomy, & Facts | Britannica
2024年10月25日 · Jellyfish, any planktonic marine member of the class Scyphozoa (phylum Cnidaria), a group of invertebrate animals composed of about 200 described species, or of the class Cubozoa (approximately 20 species). Learn more about the characteristics and natural history of jellyfish in this article.
Jellyfish: The smart stinging creatures drifting through our oceans
Discover facts about gelatinous jellyfish, including what they eat, how they move and the clever stinging adaptation that has helped them flourish for millions of years. Jellyfish are older than the dinosaurs.
Jellyfish and Comb Jellies | Smithsonian Ocean
Jellyfish and comb jellies are gelatinous animals that drift through the ocean's water column around the world. They are both beautiful—the jellyfish with their pulsating bells and long, trailing tentacles, and the comb jellies with their paddling combs generating rainbow-like colors.
Scyphozoa - Wikipedia
The Scyphozoa are an exclusively marine class of the phylum Cnidaria, [2] referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word skyphos (σκύφος), denoting a kind of drinking cup and alluding to the cup shape of the organism. [3] Scyphozoans have existed from the earliest Cambrian to the ...
Jellyfish & Other Zooplankton - Woods Hole Oceanographic …
2020年7月14日 · What are Jellyfish? Jellyfish are a type of zooplankton that both drift in the ocean and have some swimming ability. Hundreds of jellyfish species live in every part of the ocean and belong to the same animal group as corals and sea anemones.
How Jellyfish Work - HowStuffWorks
Jellyfish are prehistoric creatures that have inhabited oceans around the world for millions of years. Although their gelatinous bodies and graceful movements make them appear to be complex creatures, they are actually quite simple in both form and function. Jellyfish are planktons that have no bones, brain, or heart.
The secret lives of jellyfish | Nature
2016年3月22日 · From the fjords of Norway to the vast open ocean waters of the South Pacific, researchers are taking advantage of new tools and growing concern about marine health to probe more deeply into the...
Lion's Mane Jellyfish - Oceana
With long hair-like tentacles up to 120 feet long, the lion's mane jellyfish can rival in size to the blue whale. Learn more about this unique creature.
Jellyfish - National Geographic
2009年10月29日 · Jellyfish are ubiquitous in the Earth’s oceans. They can thrive in warm water and cold, along coastlines or out in the deep. Their bodies are about 95 percent water. And though they have no...