A lion’s mane jellyfish has up to 1,200 tentacles divided into eight clusters. There is no denying that many jellyfish are extremely dangerous, but this is simply their way of feeding. It looks like a jellyfish, but it’s not a jellyfish. Jellyfish do not actively hunt their prey, instead, they wait for prey to fall into their long tentacles. These harpoons are loaded with complex proteins which again vary with species. 1. 16. Are you wondering how many types of jellyfish are there in the world? It is soft-bodied and also a free-swimming animal with a gelatinous umbrella-shaped bell and trailing tentacles. Growing up to 120 feet long with bells up to 8 feet wide, the lion’s mane jelly is the largest known jelly species out there. The body of an adult jellyfish consists of a bell shaped hood enclosing its internal structure and from which tentacles are suspended. Tyler Fox/Shutterstock. The magnitude of this method could be very high, as they can sometimes paralyse a shark or large tuna fish. Up to 15 tentacles arise from each corner, and the tentacles may be up to 3m long. In these jellyfish the frilly projections that extend down from the underside of the body are fused, obliterating the mouth and forming a spongy area used in filter feeding.Marginal tentacles are lacking, and the gelatinous bell is firm and warty. In such a situation, the male jellyfish grabs the female with his tentacles and mates with her. The largest lion’s many jellyfish ever recorded was 120 feet (36.5 m) long. Younger immortal jellyfish are 0.04 inches in size and have 8 tentacles, while adult ones can have 80-90 tentacles. This “radial symmetry” allows jellyfish to detect and respond to food or danger from any direction. The tube penetrates the skin and releases venom. Jellyfish tentacles contain microscopic barbed stingers. Their movement depends on the direction of ocean currents as they can't swim very well. Sea wasp is a species of Box jellyfish, it is the most lethal jellyfish in the world. When threatened, the atolla jellyfish gives off a series of flashes of blue light, looking much like the flashing blue light on top of a police car. Mostly found in the coastal waters of Northern Australia and New Guinea, this species has venomous tentacles up to 3 meters (9.8 ft) long. What do they eat? 7. Man O’Wars are siphonophores, which are a type of hydrozoan comprised of many animals living together in a colony. A jellyfish is an aquatic group of animals found in every ocean of the world. In its immature polyp state, it is made up of stolons (stems) and upright branches with feeding polyps capable of forming medusa buds. 5. Check out more debunked animal myths! Lion’s mane jellyfish hunt by extending their tentacles outward and creating a trap that captures prey like fish and crustaceans. 15. Lurking below the distinctive purple gas-filled floats are long strands of tentacles and polyps that grow to an average of 30 feet and may extend by as much as 100 feet. 4. The lion’s mane jellyfish delivers a powerful sting that can be very painful to humans. Each stinger has a tiny bulb that holds venom and a coiled, sharp-tipped tube. Jellyfish have the ability to sting with their tentacles. These cells are used to capture food by injecting toxin into the prey. Like other venomous jellyfish, box jellyfish have tentacles lined with thousands of stinging cells which release tiny barbs that can penetrate the skin. No matter how long their tentacles are, jellyfish don't often get tangled with each other because they are so slippery. 6. They can have up to 1,200 tentacles, which originate from under the bell in 8 distinct clusters of 70 and 150 tentacles each. Jellyfish have special cells along their tentacles called cnidocytes. 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