The largest jellyfish is the giant jellyfish.
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The lion's mane jellyfish (Cyanea capillata) holds the title for being one of the largest jellyfish species. They can have bell diameters reaching up to 8 feet (2.4 meters) and tentacles that extend as long as 100 feet (30 meters).
Adult jellyfish can vary in height depending on the species, but on average they range from a few centimeters to several feet in height. The largest species, like the Lion's Mane jellyfish, can have tentacles that extend up to 100 feet long.
Common jellyfish species found near Ft. Lauderdale, Florida, include the moon jellyfish (Aurelia aurita) and the sea nettle jellyfish (Chrysaora quinquecirrha). Both species are known to frequent the coastal waters of the region.
The jellyfish in Jellyfish Lake, located in Palau, have evolved without natural predators due to the lake's isolation from the ocean. As a result, these jellyfish have lost their ability to sting, making them harmless to humans. They also have developed a unique symbiotic relationship with photosynthetic algae, providing them with nutrients through photosynthesis.
Jellyfish are members of the phylum Cnidaria. There are more than 100 kinds, each with its own Latin name. So there is no single Latin name for jellyfish.
Most jellyfish are carnivores that prey on fish, crustaceans and any other swimming animals they can subdue with their venomous stinging cells. In turn, many other animals feed on jellyfish, including tuna, crustaceans, and other jellyfish. In other words, they are both predators, and prey.