Casu marzu is made by letting cheese flies lay eggs in pecorino. Maggots feed on cheese, softening and flavouring it.
Jellyfish are known for their sting, yet they're also eaten. It must be human-edible and properly prepared.
Cherry, apricot, peach, and apple pips contain a chemical that becomes cyanide in the body. Small dosages are unlikely to be lethal unless consumed in large quantities.
Pangium edule is a tall tree found in Malaysia, Indonesia, and Singapore. Its flesh can be pickled or cooked, although preparation is tricky.
Cassava is used to create tapioca, fries, cake, and bread. Raw it contains cyanide, thus it must be boiled, grilled, or steamed.
The African bullfrog is a Namibian and Zambian delicacy. Animals grow large and are cooked entire, not just the legs as in France.
Fermented and salted fish dish fesikh is customarily eaten at the Egyptian spring holiday Sham el-Nessim.
Cashews may surprise you on this list. Unprocessed cashews contain urushiol, a poison ivy toxin. In excessive dosages, it can be fatal.
A name like blood clams suggests peril. The mollusks' red hue, generated by high quantities of haemoglobin, is not what makes them dangerous.
Prematurely picked fruit and seeds include the poisons hypoglycin A and B. Vomiting from consumption can kill.