The Goliath grouper, formerly Jewfish until an official name change in 2001, is a large growing reef dwelling species and as you will see is one of the hardest pulling fish you can hook into! Although they are reputedly very good eating the Goliath grouper is totally protected from harvest and is recognized as a critically endangered species by the World Conservation Union1. Like most grouper's the Goliath grouper is slow growing and is essential to the health of the underwater reef systems so protection is necessary.
This is one amazing video of one of the biggest groupers I have ever seen. It was estimated at 500 pounds! This is a great video that is a must watch (it does contain some self promotion, but nothing over the top.)
1. Wikipedia