Why are some puffer fish poisonous and some not??

Question

I'm wondering because my mom told me that she ate some before and she also told me that you would have to be crazy to eat some tipes puffer fish???

Answer 1

It isn't the meat of the Puffer that is poisonous. The poison is contained deep within special organs of the fish (including the liver). The danger of eating Pufferfish is that when the fish was being prepared, poison might have leaked from a sliced organ into the meat. Not all types of Puffers are poisonous, just like not all types of snakes or spiders are venomous.

Soop Nazi

Answer 2

From Wikipedia: "It should be noted that puffers toxin is not necessarily as toxic to other animals as it is to humans, and some species of fish routinely eat puffers, such as lizardfish and tiger sharks. Puffers toxin evolved as a response to aquatic predators such as larger fish, rather than for use against humans. Note also, not all puffers are poisonous; Takifugu oblongus, for example, is one of the fugu puffers that is not poisonous."