I fished Ft. Laderdale water for 30 years.. thats bull... MOST hammerheads I've seen are several humdred pounds.. maybe not 500 lbs but several hundred anyway.. at least 150 lbs..
Caught a baby hammerhead once and bopped it on the head to get the hook out. When I threw it back in the thing swam around in circles with it's head out of the water attacking the side of the boat.
Saw a large hammerhead once while trolling in the Gulf Stream. He was riding inside a swell so we got a good view of his whole length....he sniffed our bait and wasn't interested, just kept on cruising.