The Deadly Poison of the Pufferfish: A Unique Adaptation for Survival and Reproduction.
Research conducted at the Institute of Molecular and Cell Biology and the National University of Singapore has revealed how the pufferfish thrives despite possessing dangerous levels of toxins in its body.
Scientists indicate that a process known as evolutionary adaptation has enabled the pufferfish to become immune to tetrodotoxin, a toxin that is 20 times more lethal than cyanide. This toxin originates from its diet, primarily from toxic marine organisms.
“By comparing the genetic sequences of pufferfish, zebrafish, and humans, the team discovered the evolutionary adaptations that grant the fish the ability to resist toxins. Besides aiding in self-defense, the resistance to tetrodotoxin allows the pufferfish to consume toxic food sources that other species typically avoid,” said a researcher.
This toxin is also used by female pufferfish to attract males during the breeding season.
This toxic fish is considered a delicacy in Japan. Top chefs are trained in the art of removing toxins before preparing the fish. They pay special attention to the liver, ovaries, intestines, and skin – the parts that contain the highest toxin levels.
If customers accidentally ingest the toxin, they may suffer from paralysis, coma, severe skin burns, or seizures.
M.T. (according to AFP)
