Most poisonous Shark
The Greenland shark (Somniosus microcephalus) is the most poisonous species. Although its flesh is popularly eaten in Greenland and Iceland, it must be boiled in several changes of water first. This removes its poison- a neurotoxin known as trimethylamine oxide- which causes effects resembling extreme drunkenness.
Interesting thing about this most poisonous shark is that many people regularly eat it as staple food.
Somniosus Microcephalus Picture
Check out the picture of this amazing creature;