Fish you can eat – or turn into a real sword

The swordfish uses its bill to slash its prey, weakening it and making it easier to catch instead of killing it instantly

A Hawaiian fisherman was killed by one which punctured his lung in 2015

Swordfish bills can be turned into swords which are sold for hundreds of pounds on the internet

The fish can swim at up to 16mph (the often quoted speed of 60mph is a myth), reach 15ft in length and weigh up to 102st – 20 times the weight of a labrador

While popular as food, the fish has high mercury levels and should be

eaten only once a week or less Females are larger than the males. The largest ever caught weighed 84st

They have special organs next to their eyes that keep their brain and eyes warm in cold water. This improves their ability to see

Their scientific name is Xiphias gladius. Gladius means sword in Latin