I have caught five of the elusive suckers. Two were doubles so I have three in my Sea Chest.
When one comes up, the other fish in the sea scatter. You screen changes a bit and big legendary hits your lure. That is when the fun begins. And by fun I mean the frantic mouse clicking and the circles withe the mouse and the difficult "Grab the Handle" maneuver. It's fun and I have been lucky enough to get five out of five.