Several reports focus on the danger posed by pufferfish that contain tetrodotoxin, a highly toxic substance. Tetrodotoxin is described as one of the deadliest poisons found in nature and is presented as lethal in very small amounts. The poison works by disrupting nerve signaling in the body, effectively blocking transmission of signals that control normal muscle and bodily functions. The articles emphasize that the danger is linked to the presence of tetrodotoxin in the fish, rather than to any particular injury or appearance of the animal alone. They also frame the issue as a potential summer-related risk for people spending time at Mediterranean beaches, implying that encounters or exposure could become more likely during warmer months when marine activity and shore use increase. Overall, the coverage highlights tetrodotoxin’s extreme potency and the mechanism of action—interference with nerve pathways—as the main points of concern.