How does jellyfish dominate the sea when there is no brain?

There is no brain and most of the body is water, but jellyfish have a lot of esper powers.

When we think of dangerous animals, a jellyfish full of water without a brain does not seem to be on this list. But if the swimmers hear 'jellyfish!', They will stand as seriously as African weasels, since jellyfish can take them down.

Both beautiful and dangerous, jellyfish are the convergence of contradictions. Let's take a look at the superpowers of jellyfish.

Some jellyfish have 98% water

Jellyfish have survived every great extinction.

Jellyfish biologist Lucas Brotz, a postdoctoral researcher from Vancouver's British Columbia University, said the main body of jellyfish - bell - is made up of two layers of thin cells with invisible matter. born with water in the middle. He said that this simple structure is a "clever evolutionary tactic" that allows them to grow bigger and eat more without a fast metabolic rate.

Brotz said: 'They survived every great extinction'. While most species that once lived are extinct, the 'water-filled creatures have somehow survived' , for over 600 million years.

. and super fast

Sean Colin, an ecologist at Roger Williams University, Rhode Island, said a jellyfish's burning is 'one of the fastest processes in biology'. This is also quite complicated for a species that seems to be a simple creature.

The jelly cells of jellyfish are called cnidocytes, a unique feature of jellyfish and their relatives such as corals and anemones. Inside these cells is a cell organ called a magnet capsule, which contains what Colin describes as a capsule with small tuberculins rolled inside.

When stimulated to attack, hundreds of magnets will be released. That release of pressure creates very fast spikes, lasting only 700 nanoseconds, with enough force to break the weakest shell of crustaceans.

They do not intentionally burn you

Magnets are activated only by touching any organic matter, including us.

The burning of some jellyfish, such as the box jellyfish north of Australia and the Indian Ocean - Pacific Ocean, can be deadly, while other species possess the motto of not piercing human skin.

However, jellyfish do not burn each other. Brotz said chemicals that were accidentally released could prevent that.

Jellyfish farmers

Not all jellyfish are floating with the bell above. Jellyfish reverse upside down and live on the seabed in tropical waters in the Indian-Pacific Ocean, Florida, the Caribbean Sea, and Hawaii.

This jellyfish lays the bell on the seabed like a sunbathing vacationer, which is roughly what they are doing. Brotz says, they keep microalgae in their tissues and 'hold them toward the sun to give them growth' , and then use that algae as a source of nutrition.

According to Brotz, golden jellyfish in the Jellyfish Lake Palau also feed on algae. They swim after the sun as the sun moves from side to side of the lake during the day and cultivates their 'crop' at night.

Gold jellyfish swim in the sunlight on Lake Sua, a saltwater lake in Palau - (Photo from Michael Melford, National Geographic Creative).

Jellyfish indirectly won the Nobel Prize

Brotz notes, many jellyfish of the 3,000 species identified so far are bioluminescent, meaning they can glow on their own. An important part of this trick is used by a crystal jellyfish, a gene called green fluorescent protein or GFP.

When used by scientists as biological markers, this protein actually luminescent into the body's internal activities, tracking processes from insulin production to HIV infection to muscle structure.

Researchers who invented this technology won the 2008 Nobel Prize in Chemistry.

Jellyfish, scientific name is Aequorea victoria - (Picture of Joel Sartore, National Geographic Photo Ark).

They are dangerous even when they die

The magnets of a jellyfish like mad people in horror movies give up. You can be burned by a tentacle that is separated from your body, or even a dead jellyfish.

And if you eat a squid that has eaten a jellyfish but hasn't digested it completely, that jellyfish can 'burn' you.