ROCKINGHAM Coastal Sharks are reserve grade premiers after a John Taituha field goal gave them a golden point win over South Perth.
The contest went to golden point extra time after finishing 24-24, despite the Sharks holding a 24-12 lead with only 10 minutes to go.
Despite a number of unsuccessful field goal attempts and 28 extra minutes being played, neither side claimed the win until Taituha landed the final play of the game, but not before his kick struck the goal post, bouncing back in and over the bar.
Ian Wood, Damien Hamlyn, David Tuliloa and Matt Pora all bagged tries for the Sharks, while Taituha kicked four out of four conversions and bagged the game-winning point.
Sharks centre Logan Barclay was named best on ground.
Earlier in the day, the Sharks third grade lost their grand final, going down in another close contest 22-24 to South Perth.
Both sides scored five tries, but the Lions were slightly more accurate with the boot, with half back Anthony Piggett successful from one more conversion than Sharks five-eighth Luke Hughes, who was named best on ground for his three tries and two goals.
Fremantle Roosters, the Sharks conquerors in the preliminary final, pulled off an upset in the NRL WA Premiership title decider, downing South Perth 26-10.