Learn more about jellyfish, these gelatinous animals that we will meet in the water this summer!
Delphine Thibault MIO Mediterranean Institute of Oceanography intervened (from 38'10") on jellyfish and gelatinous bodies in Le club de la Terre au carré France Inter.
Every year on the beaches or in the lagoons, holidaymakers are stung by jellyfish. It also happens that our coasts are facing strandings of jellyfish regularly reported in the press, these strandings are studied by scientists. Jellyfish sometimes indicate highly polluted areas where the ecosystem has been particularly disturbed. But who are these gelatinous animals so elegant in the water and how do they end up stranded on our coasts? What is their role in the environment?
Jellyfish are composed of 95% water, they have no brain, a simple neuron system, but they have growth rates that are among the fastest in the terrestrial and marine animal world combined. They are able to survive with temperature variations of a good ten degrees and important salinity variations. They also survive in places where oxygen levels are very low.