There is a small marine species that has put several parts of Spain on alert. The sighting in Cantabria, Galicia, the Basque Country and Andalusia of specimens of the Portuguese man-of-war, a colony of marine organisms that can cause painful stings with their tentacles, has forced yellow caution flags to be placed in several sandy areas and has put the authorities on guard. local. Although its appearance may resemble that of a jellyfish, this marine species —Physalia physalis, by its scientific name—is actually a floating colony of organisms that associate to survive and that usually drift in warmer waters and out to sea. His irritating bite It can cause complex skin lesions and, in the worst case, have serious neurotoxic effects on humans.