Tell some amazing facts about Jellyfish ?

Jellyfish Are Not Good Swimmers:
With no flippers or fins, jellyfish are weak swimmers. They swim by contracting the muscles at the bottom of their belly.

The upside-down jellyfish do not even float in the waters. Instead, they bring themselves to the ocean floor using their short arms and tentacles. They look more like a bowl of plants than typical jellyfish.

Jellies do not chase or stalk their prey. Instead, they swim or drift with the tentacles dangling behind them. If a fish or other small creatures bump into the tentacles, it is zapped by the stingers. Then they use the oral arms to move the prey to the mouth.

Along with the tentacles, jellies also have a secret weapon, that’s their oral arms and their tiny stinging cells called nematocysts. These cells contain little harpoons full of venom, which can kill or stun the prey.

Though most animals avoid jellies, some like hanging around with them. A few marine creatures use jellyfish as a kind of bodyguard. For instance, crabs are known to hitchhike on jellyfish. Some tag along for a ride inside its bell or just stay close to the jelly. There are different ideas why the tagalongs are unharmed by the jellies. Some researchers say that these tagalongs cover themselves with mucus to keep the stingers from firing. Or maybe they are just too careful not to touch the jelly’s tentacles.

If you cut a jellyfish in two, these two pieces can regenerate and create two new organisms. It can clone itself, even when it is injured, thereby producing hundreds of offspring.

The movement of the bell-shaped jellyfish has given the researchers with an understanding of propulsion. Their flexibility of their umbrella-shaped bodies allows the jellyfish to move upwards and downwards without expending too much energy. Researchers have created a biomimetic robot with flexible bells, which can lead to better undersea vehicles.

There are two stages in the life of a jellyfish- the mobile medusa phase and stationary polyp stage. They earned the nickname ‘immortal jellyfish’ for its ability to travel to the polyp stage in times of stress.

Jellyfish are very aggressive colonizers. When the Comb Jellies were introduced in into the Black Sea in the year 1982, they totaled 900 million tons. Eight years after the introduction, they caused $350 million in losses to the Black Sea’s tourism and fishing industries

A group of jellyfish is called smack or bloom. A smack or bloom of jellyfish can consist of more than 100000 jellyfish.

You must have noticed that jellyfish are mostly kept in round aquariums. That’s because round aquariums prevent them from getting stuck in the corners.

If someone is stung by the jellyfish, pour vinegar over the wound and seek medical assistance as soon as possible.

The movements of jellyfish inspired a flying machine at the New York University.

Jellies’ fluorescent protein can be used to make power medical devices in the future.

Common predators of the jellyfish are tuna, sharks, jellyfish, sea turtles, swordfish, and Pacific salmon.

Jellyfish blooms near Japan can have around 500 million jellyfish, with each jelly the size of a refrigerator.

Jellyfish account for over ten times the weight of the annual fishes caught around the world.

Many jellyfish have bioluminescent organs, which emit light. This light may help them in a number of different ways, like attracting prey or distracting predators.

If a jellyfish is cut in two, the pieces of the jellyfish can regenerate and create two new organisms. Similarly, if a jellyfish is injured, it may clone itself and potentially produce hundreds of offspring.

There are two phases to jelly life: the stationary polyp stage and the mobile medusa phase. It's the medusa phase that we're usually referring to when we talk about jellyfish. Typically, jellies start as polyps and develop into medusas, but the Turritopsis nutricula has earned it the nickname "the immortal jellyfish" for having the ability to travel backward to the polyp stage in times of stress.

The movements of bell-shaped jellyfish have provided researchers with a new understanding of propulsion. The flexibility of their umbrella-like bodies allow them to pulse upwards and downwards without expending much energy. Researchers have created biomimetic robots with flexible bells, which may one day lead to better undersea vehicles.

The scientific name for this jelly is Drymonema larsoni, but its aggressive sting and distinctive color have earned it the nickname "pink meanie."

Instead, jellyfish have nerve nets which sense changes in the environment and coordinate the animal's responses.

It's probably not that surprising that jellyfish have served as inspiration for swimming robots. However, it's more unusual to see a sea creature inspire a flying machine, but that's just what happened at New York University.

Turtles eat jellyfish, and larger jellies may eat smaller ones, but are jellyfish fit for human consumption? A group of high school students in Japan came up with a salted caramel recipe that uses powered jellyfish. It's not vegan for sure, but it is one way to deal with an invasive jellyfish bloom.