There are multiple species of grouper, but none are more popular than goliath grouper. This species of grouper can weight hundreds of pounds, and they're often responsible for broken lines and lost tackle. Below is a collection of some of the biggest grouper ever caught, including a world record goliath grouper. You just might think twice about targeting giant grouper after seeing the photos in this list. These catches were approved as IGFA all-tackle world records.