As a section about Fugu fish in the "Top 10 Most Dangerous Foods" article on the Time magazine website suggests
The toxin is so potent that a lethal dose is smaller than the head of a pin, and a single fish has enough poison to kill 30 people.
but on a wikipedia page about Fugu we can see an article claiming that
Poison concentrations vary from fish to fish, so poisoning may not always lead to death, instead giving little more than numbness on the lips and tongue while eating and shortly thereafter.
So basically the question is, is it actually possible that Fugu fish which sometimes has just enough poison to numb ones lips and tongue can also have enough poison to kill 30 people?