The name jellyfish, in use since 1796, has traditionally been applied to medusae and all similar animals including the comb jellies (ctenophores, another phylum). Jellyfish are bell shaped or umbrella shaped creatures that have adapted themselves very well for a life in water. Invasive Species & Fisheries. Groups of jellyfish can contain over 100,000 of them. Speed! The jellyfish are inhabitants of the tropical seas and the Arctic´s cold waters, where they have been for more than 650 million years.. A jellyfish uses its mouth to eat food, discard waste and squirt out water to propel itself. Adding to the animal’s distinctive appearance are conspicuous white patches of fur under the eyes. Fast jellyfish facts. Ocean sprawl provides more and better habitat for jellyfish to reproduce and complete their lifecycles. In 1982, it was discovered in the Black Sea, where it was transported in ballast water. Phylum: Cnidaria Class: Scyphozoa Classification: Invertebrate IUCN status: Not evaluated Lifespan (in wild): One year Weight: Up to 2kg Body size: 2cm to 2m Top speed: 8km/h Diet: Fish, shrimp, crabs, tiny plants and even other species of jellyfish Habitat: Oceans The immortal jellyfish (Turritopsis dohrnii) is estimated to be immortal and have an … Jellyfish come in a wide variety of shapes and sizes. Almost all jellyfish inhabit only the marine waters of the world, there is one species of jellyfish which has its habitat in fresh waters. Jelly like substance makes up most of its jellyfish body.They are beautiful creatures found in water that have been a subject of fascination for a lot of people. In the wild, a moon jellies lifespan is held captive by the dictates of nature. In a jellyfish aquarium their lifespan can reach in excess of three years if properly cared for. Join us as we travel the oceans far and wide with these electric jellyfish facts!. These jellies can MOVE on their own. Did you know that they also have another defense? Like all jellyfish, Turritopsis dohrnii begins life as a larva, called a planula, which develops from a fertilized egg.A planula swims at first, then settles on the sea floor and grows into a cylindrical colony of polyps. These ultimately spawn free-swimming, genetically identical medusae—the animals we recognize as jellyfish—which grow to adulthood in a matter of weeks. Their life cycle is limited to a single calendar year from start to finish. Names. A group of jellyfish can be referred to as a bloom, smack or swarm. In nature, moon jellies spend most of their … Oddly enough, they are not true jellies because true jellyfish are Medusa jellyfish and are weak swimmers relying only on the currents to move them. Platypus, small amphibious Australian mammal noted for its odd combination of primitive features and special adaptations, especially the flat, almost comical duck-beak-like bill. This ctenophore is native to the east coast of North and South America. It subsequently spread to the Caspian Sea. Jelly Fish’ Habitat and Distribution. Jellyfish seem to blend in with their environment, undulating gently with the ocean's currents, and with good reason: Their bodies are made up of as much as 98% water. They can travel up to 7.5 miles per hour in the water so they do have some defense against predators. They are pelagic animals, that is, they live in the open sea, and although they can be propelled with rhythmic movements of their umbrellas, they move basically at the mercy of the sea´s currents. The largest is the lion's mane jellyfish (Cyanea capillata), which can have a bell over six and a half feet in diameter and weigh up to 440 pounds; the smallest is the Irukandji jellyfish, several species of dangerous jellyfishes found in tropical waters, which measure only about two-tenths of an inch and weigh well under a tenth of an ounce. 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