7 Most Dangerous Jellyfish in the Underwater World

Photo 5 of 8

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!

INTERESTING TOP Best Islands for Active and Beach Recreation

TOP Best Islands for Active and Beach Recreation

Are you tired and want to get distracted? These places will give you unforgettable impressions and the warmest memories of a lifetime. Warm sand, azure shores and a stunning underwater world will not leave anyone indifferent. This collection contains the best islands for rest and relaxation.
ANIMALS How Different Animals See the World

How Different Animals See the World

Everyone probably has long known that animals see this world differently from humans. Some may even know what exactly is changing in the visual perception of a snake, cow or turtle. But sometimes knowing in words is sometimes not enough, so we offer you to see everything with your own eyes!
INTERESTING Named «Most Unfortunate» Age in a Person’s Life

Named «Most Unfortunate» Age in a Person’s Life

In the life of every person, sooner or later, there comes a period when it seems that everything is going wrong: there is no money, you are tired of work, there are problems in your personal life, and in general there is no mood for anything - in general, a complete breakdown of strength and energy! And no, this is not a description of the autumn depression, as many might think. Such a period can occur for every person. You can call it an age crisis or "unhappy age", but it is probably worth knowing when it is approximately worth preparing for changes in mood ...
SOCIETY The Most Beautiful Girls in the World According to Google

The Most Beautiful Girls in the World According to Google

Rating is difficult and even pointless, and beauty is a very relative concept, especially when it comes to girls and their external data. But, nevertheless, it is possible to understand which girls are in the TOP taste preferences around the world! The well-known Google search engine ranked the most attractive girls around the world based on the preferences of their users and was not greedy to share it on the network ...