John Dory is a salt water fish, known for its white, meaty flesh which is delicate and sweet. The meat might be delicious, but John Dory isn't the prettiest, or the most economical of fish. It has spines running down its side, and is easily-distinguished by its very large head. A small John Dory might weigh 300g, but they can grow up to 2kg.
 
Also known as St Peter's fish, the John Dory is said to have been plucked from the sea by St Peter. But maybe that is just folklore! 
 
Either way, it is a delicious to eat treat of a fish!