The fishing faq says that the person who casts the net has a 1 in 4 chance of getting a marty, and then if they don't get one they have a 1 in 16 chance to do so from the damage they do to the Leviathan. The group did a great job of keeping me alive and I thought I got some good hits on the Leviathan.
I'm kinda greedy, and I think for the amount of work it takes to get those nets, the reward should be higher

Meredyth