What is the world's largest type of jellyfish?

The world's largest jellyfish is the lion's mane jellyfish (Cyanea capillata), which is also known as the giant jellyfish. It can have a bell diameter of up to 7.9 feet (2.4 meters) and its tentacles can reach a length of over 120 feet (36.5 meters), which is longer than a blue whale. This jellyfish can be found in the cold waters of the Arctic, northern Atlantic, and northern Pacific oceans.

The lion's mane jellyfish is a carnivorous predator that feeds on small fish, crustaceans, and other jellyfish. Its tentacles are covered with thousands of tiny, stinging cells called nematocysts, which are used for defense and to capture prey. Its sting can be painful and even potentially dangerous to humans.

The world's largest type of jellyfish is the lion's mane jellyfish (Cyanea capillata). It is found in the Arctic, northern Atlantic, and northern Pacific Oceans. The largest recorded specimen was measured off the coast of Massachusetts in 1865 and had a bell with a diameter of 210 centimetres (7 feet) and tentacles around 36.6 m (120 ft) long. Lion's mane jellyfish have been observed below 42°N latitude for some time in the larger bays of the East Coast of the United States. The lion's mane jellyfish uses its stinging tentacles to capture, pull in, and eat prey such as fish, zooplankton, sea creatures, and smaller jellyfish.

The lion's mane jellyfish is a beautiful creature, but it is also dangerous. Its tentacles contain venom that can cause a painful sting in humans. In rare cases, the sting can be fatal. If you are stung by a lion's mane jellyfish, it is important to seek medical attention immediately.