7 Most Dangerous Jellyfish in the Underwater World

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Portuguese boat (Physalia physalis)

The second name for jellyfish is physalia. Although this is rather not even a jellyfish, but a whole colony of polypoid and medusoid individuals. The «bite» of a Portuguese boat is extremely dangerous and painful (sensations are compared to hitting the skin with a whip). The main risk is the systemic effects of the poison. In severe cases, intense pain is followed by fever, shock, and impaired heart and lung function, which can lead to death. Physalias are accustomed to moving in groups of up to 100 colonies, and sometimes in resorts they have to close entire beaches because of them!

CELEBRITIES Nobody knows about Elon Musk! 15 facts

Nobody knows about Elon Musk! 15 facts

The well-known billionaire and invent Elon Musk never tires of surprising the world with his incredible ideas. This man managed to achieve really great heights in the technology industry, develop a promising business and become the idol of millions of people! His ambitions destroy all the usual framework of the possible, and ideas strike the minds of even experienced professionals. It seems that his whole life is accessible at a glance, but still there are a few things that you are likely to learn about for the first time today ...