I'd be very surprised if the fish was actually hooked at 30 feet with a crankbait. Trolling a 6XD with 12lb line I can tick bottom at 21 feet. With a 10XD maybe a hair over 25. I know there are modifications and different techniques that can be used to get a few cranks down that deep, but if that is really what happened this guy was fishing where few have fished before. In any case I'm excited to hear more details, and congrats on an awesome fish!
A Manns 30+ will hit 30 feet out of the box, so will one of the Luhr Jensen cranks, can't remember the name.
And just because the fish was caught in 30fow doesn't mean it was sitting on bottom. . .it could have been on a 6XD if the fish was suspended. . .