Toxicological Trivia from March, 29, 2010: The succulent white crab meat can become a poison if taken in the closed season in Ecuador. Between 15 August and 15 September, the crustacean enters a silent period, so prohibiting their capture, marketing and consumption. For a month, the crab is molting stage, ie as their internal organs and create a new shell. At that time it produces a poison called:
a) Calcium oxalate;
b) Sodium citrate;
c) Potassium nitrate.

Correct Answer a. Read more in Spanish news: Beware Ecuadorians crab with calcium oxalate II