She was too worn out from the half-hour bout of being reeled in. As you may or may not know, all sharks aside from nurse sharks must keep moving to keep water flowing over their gills. If not, they suffocate.
Half hour, ir even an hour, isn't a long bout, not hy a long shot. They found over a dozen large sting ray spins inside her, including one lodged near her spine. They think one of the reasons she was so easy to bring in was she was already weakened.
Also, I included an article inbthe source that talks about how they tried to get her back in the surf, and after eventually having to admit defeat they were able to harvest over 400 pounds of meat that was donated to a local charity
http://www.foxnews.com/great-outdoors/2018/07/16/texas-fisherman-reels-in-hammerhead-shark-catch-multiple-lifetimes.html
*I just noticed the title smh INTERNAL stingray wounds...yikes