Tell some amazing facts about Jellyfish ?

They are able to absorb oxygen and nutrients through the cell walls of their inner layer and even through their outer layer.

The largest jelly is the lion’s mane jellyfish, which grows up to 6 meters in diameter and has stinging tentacles up to 50 meters long.

A few years ago, scientists from the Mayo Clinic injected unfertilized cat eggs with a green fluorescent protein found in crystal jellies and a gene from rhesus monkeys known to block the virus that causes feline AIDS.

The only significance of the jellyfish protein was that it would indicate if the gene had successfully transferred. Sure enough, when the kittens were born, they glowed bright green when placed under a black light.

Sadly, that’s not often used anymore. The preference these days is to call a large gathering of jellies a "swarm."

Jellyfish can reproduce sexually by releasing sperm and eggs into the ocean where they form tiny, free-swimming larvae.

These larvae then grow into polyps which attach to smooth surfaces and can split into numerous young jellyfish, thus reproducing asexually.

Researchers at Virginia Tech hoping to build self-powered aquatic robots used jellyfish as a model, building a 170 pound aquatic bot they dubbed Cyro to test their idea.

The propulsion system of a jellyfish runs on very little energy, which makes it a great model for autonomous, undersea robots of the future.

Sea turtles aren’t the only creatures that like to feast on jellies now and then. Blubber jellies, for example, are considered a delicacy in parts of Asia, and students at a Japanese high school once used powdered jellyfish to make salted caramels.

Instead of a brain, jellies use a “nerve net” to process sensory information. Specialized structures like statocysts help jellyfish know if they're facing up or down, and rhopalia allow them to sense light, chemicals and movement in the water.

This is the most basic nervous system a multicellular organism can have, and it’s also found in hydras and anemones.

Jellyfish and jelly-like sea creatures come in an immensely diverse range of forms. Animals that are typically called jellyfish belong to the phylum Cnidaria, which includes over 10,000 species.

However, some jelly-like animals, like the comb jelly, belong to the phylum Ctenophora. This taxonomic difficulty has lead marine biologists to ask if there's even such a thing as a jellyfish.

Let's set those questions aside for now, and dive together into the fascinating world of creatures commonly known as jellyfish.

Some jellyfish can glow in the dark
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.

Jellyfish can clone themselves
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.

Some jellyfish are immortal
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.

Jellyfish can teach us about efficient underwater propulsion
The movements of bell-shaped jellyfish have provided researchers with a new understanding of propulsion.

Not all jellies have tentacles
The scyphomedusa deepstaria, shown in the video below, doesn't need tentacles to trap its prey.

There's a giant jellyfish called the pink meanie
The scientific name for this jelly is Drymonema larsoni, but its aggressive sting and distinctive color have earned it the nickname "pink meanie.

Jellyfish don't have brains
Instead, jellyfish have nerve nets which sense changes in the environment and coordinate the animal's responses.

Jellyfish movements inspired a new way to fly
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.

Jellyfish powder has been used to make salted caramel
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.