Organic contamination and absence of predators, causes of jellyfish proliferation

the jellyfish are organisms “very simple although they have 500 million years“, says scientific diver and researcher at the European University of the Canary Islands, Juan Diego López Arquillo. These “take advantage of the organic pollution of the oceans” in addition to benefiting from the absence of predators, which facilitates their proliferation in bathing areas, said the researcher in statements to EFE.

Despite being “annoyed” by the toxins who transmit their tentaclesthese gelatinous animals “are more necessary than we think,” says López Arquillo.

Indeed, “they constitute a food for higher species in the trophic chain” which, by devouring them, regulate their quantity, so another reason for their increase is “overfishing their predators“. Among the predators are sea turtles, crustaceans, corals and various types of fish, such as sunfish or sharks.

These animals cnidarians or coelenterateslike the rest of the inhabitants of the seas and oceans, they also suffered the three big changes in your ecosystem: “those of contribution, those of limitation of species and temperatures”.

Jellyfish not only proliferate in warm or hot water, as there are species adapted to the cold

In that sense, “the climate change could be a decisive factor for their growth” because, although “it is not possible to know exactly why they reach some coasts more than others”, it is proven that if the water temperature increases, in the following year, “jellyfish have an easier time to play” in the same area.

López Arquillo also referred to the “many myths that exist around them” and cites as an example the fact that she was presented to the Portuguese caravel like a jellyfish when “it is not, but a hydrozoan which belongs to the same class.

In addition, according to the collective imagination, jellyfish only proliferate in warm or hot waters, but this is also not correct: they live better at higher temperatures and are therefore more seen on the Mediterranean coast, but there are species like the pelagia noctiluca (or carnation jellyfish) tan cold adapted which “is often found in the Atlantic and the Cantabrian Sea”.

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“Even in the coldest waters of Antarctica we can find cnidarians such as corals”, recalls this expert, who lists the most common species on the Spanish coast: Stomolophus meleagris (or cannonball), Cotylorhiza tuberculata (or fried egg) and Rhizostoma pulmonary (or jellyfish).

In case of contact with them, do not wash the affected area with fresh water, but clean the irritated skin with salt water.

other information inaccurate is that jellyfish stingbut “actually they do not, but one is he who is bitten in the rubbing against stinging cells” of its tentacles, known as cnidocytes and tools for hunt your prey.

In case of contact with them no need to wash the affected area with cool water, but “clean the irritated skin with salty waterso that there are no traces” of its toxins and, later, “use corticosteroid creams if necessary” to deal with the inflammation.

The danger of these irritations has a lot to do not just with the pungent ability of each species, but with the reaction of the body of each affected individual.

Then the chironex fleckeri (or sea wasp) is a deadly jellyfish and also one of the deadliest animals on the entire planet, although the specialist from the European University of the Canary Islands recommends not worrying too much about its presence, since “it usually lives in the Australian coast“.

Although the first impulse of some bathers when discovering jellyfish in the water is to take them out and leave them to die in the sand, this expert points out that this “is an act of ignorance” when “we simply have to be extremely careful or not goes into the sea, because after all that is your home”.

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