United Kingdom law states that whales, dolphins, and sturgeons are royal fish. The porpoise was later added to the list of royal fish by Sir Matthew Hale.
Any royal fish caught become personal property of the monarch of the United Kingdom as part of their royal prerogative. The monarch’s right to royal fish was recognized by a statute enacted during the reign of Edward II.
Henry Bracton stated that the king owns the head and the queen owns the tail. Sturgeons are actually a group of about 26 different fish, though. They are characterized by elongated bodies ranging from 7 to 12 feet long and a scale free body.
Some sturgeons are completely freshwater fish while others stick to the coast. It is very rare for them to venture off into the deep ocean. Several types of sturgeons are harvested for their roe and made into caviar. Many species of sturgeons are at risk for extinction.