There can only be one Fat Bear Week winner and this year's slate is looking impressively large.

Fat Bear Week is an annual competition that pits the brown bears of Katmai National Park in Alaska against one another in a March Madness-style bracket.

Stars snarling at each other, mate-swapping, dominant males posturing and establishing their territory. It's not quite "Jersey Shore," but these are among the highlights of the second season of an Internet reality show coming your way this week.