September 29, 2023

Giant files: Nomura and Lion’s mane jellyfish

The Nomura Jellyfish
A Nomura jellyfish at Little Munsom Island, Jeju-do, South Korea.
Nomura Jellyfish are a big types of jellyfish that can grow up to over 2 meters (6.5 feet) in diameter and can weigh well over 200 kgs. They generate in the seas between China and Japan, and from time to time, they give authorities in Japan some huge headaches as theyve been getting into the Japanese shores for a number of years now.

Paradoxically, their population flowers, which appear to be becoming more common in the previous 20 years, may be caused by human activity: global heating, overfishing, and the disruption of the sediments which their polyps require are all causes that could be intensifying population blooms.
Nomura jellyfish have become such an issue that a committee has been formed simply for them, and researchers have been attempting to promote them as a novel food. Students in Obama, Fukui (Japan) have managed to turn them into a sort of tofu, and they likewise handled to extract collagen, which is helpful for the skin.
Size contrast of a Nomuras jellyfish next to a scuba diver.
Size isnt the only thing that makes the Nomura Jellyfish so special. Eventually, the stacks break off, and the medusa-stage jellyfish go on to end up being full-grown individuals.

Let me introduce you to among the most interesting animals youve most likely never ever become aware of– or rather, make that 2. Lets take a quick dive into the world of 2 giant jellyfish.

Unsurprisingly provided its size, the Nomura Jellyfish can also provide a quite hazardous venomous sting. Its not as bad as the sting of other, smaller jellyfish, it can be rather uncomfortable to people, and in severe cases, even fatal.
The jellyfish consumes plankton across all phases of its life, but when it grows huge, it can even feed on some fish– and it has few natural predators. In just 6 months, it can grow from the size of a grain of rice to higher than 6 ft (1.8 m) large.
So what caused this species to grow so big, even 100 times bigger than the typical jellyfish? Well, its genetics and lack of predators obviously contribute, but in recent years, population flowers of especially large individuals seem to be on the riseScientists have actually had the ability to come up with a few theories as to why this happens, and theres a huge possibility that all these theories work together:

Size isnt the only thing that makes the Nomura Jellyfish so special. Women carry their fertilized eggs in their own tentacles till they grow as larvae– and when the larvae are big enough, the females deposit them on a difficult surface area, where they grow into polyps. Ultimately, the stacks break off, and the medusa-stage jellyfish go on to end up being full-grown people.


The tentacles are covered with millions of stinging pills included within the cells from the tentacles. It likewise lives in very cold waters, even in the arctic locations, and can not cope with warmer waters so dont anticipate to meet them when you go swimming anytime quickly.

Oh, I forgot to mention that this jellyfish (popularized in among Sherlock Holmes original adventures) regularly grows over 2 meters in bell diameter and 30 meters in length, at the end of each summer season. Luckily, by that time, they are rather unusual.
Eventually, these large, alien-like animals populate the same Earth we do– theyre travelers on the same area rock as us. As off-putting and unusual as they might seem, their existence is not to be feared. Instead, we need to make every effort to understand and value the diversity of life in the world. After all, thats what makes it so unique.

Even with the full aid of the federal government, the Japanese have actually found it very hard to come to terms with these giants. Of course they arent never-ceasing, however the problem is that whenever they feel under attack or threatened, they launch billions of sperm or eggs which attach to rocks or corals and when conditions are beneficial, they detach and grow into more jellyfish.

Lions hair jellyfish.
Image through Wiki Commons.
Jellyfish have been around for almost 700 million years, making them older than the dinosaurs. They are really simple yet effective animals, having no bones or cartilage, no blood, no heart, and also no brain! As a matter of fact, they are comprised of 95% water. Sure, you can call that basic or brainless, but it is pretty efficient.
To make them a lot more interesting, the lions mane jellyfish might just be the longest animal worldwide. In 1870, off the coasts of Massachusetts Bay, locals found a washed-up specimen that had a diameter of 2.3 meters, and its arms were 36.5 meters long, longer than a blue whale!
In 2010, up to 150 beachgoers in New Hampshire, USA, were stung by broken-up Lions hair jellyfish stays– and researchers assumed this was caused by a single specimen

Jellyfish have been around for almost 700 million years, making them older than the dinosaurs. As a matter of truth, they are made up of 95% water.

Its significant that not just does each jellyfish seem bigger, however their variety has actually increased as well.

Chinas big dam, the Three Gorges Dam on the Yangtze river is the most significant hydroelectric task. It likewise increased the amount of phosphorus and nitrogen in the waters off China, which is simply what the Nomura jellyfish search for in a breeding ground.
It is possible that the waters have actually been improved in nutrients due to the activity of farms.
The 3rd theory is once again related to Chinese activity, especially with the development of harbors and ports, which are structures the larvae attach themselves.
It could be that due to global warming the waters are heating and the waters are becoming more acidic, making it a much better environment for jellyfish
The last theory is that China has actually overfished their waters and eliminated the predators that eaten the larvae.