- Somniosus microcephalus
- Not Applicable ()
The most poisonous shark is the Greenland shark Somniosus microcephalus. Although its flesh is popularly eaten in Greenland and Iceland, it must be boiled in several changes of water first, in order to remove all of its inherent poison – a neurotoxin known as trimethylamine oxide. Upon digestion, this compound breaks down to yield trimethylamine, whose effects resemble extreme drunkenness.