It is xtreme and bloody. You do have a fishing pole but you are also in the water with a spear gun and shooting a cross bow from the shore or a boat.
They call it fishing, but its really three games in one.. one is fishing, the other two really feel like hunting with the bow and spear gun, though since you are going after fish I guess its technically fishing.
Multi-player works well. Fast, good to play with buddies. Its basically an on-rails shooter kind of deal.