Sharks are amazing creatures. I've caught a lot of them, biggest was a 12 ft tiger, when I was about 13 years old, I will never forget that. When I was young we always killed sharks, now I know how foolish that was. When I hook one now adays I try to break it off quickly. If I do get it to the boat I always cut the line to release. Hooks don't last a long time in a shark's mouth, that is the lowest impact thing to do.