
A luckless fifth at his previous run in the Listed WATC Melvista Stakes over 2200 metres, Action was favourite for the Derby and delivered on his potential.
He powered to the line for William Pike to win by four lengths in a dominant display, becoming the third classic winner this season for his sire Pierro to join Levendi (ATC Australian Derby) and Pinot (VRC Oaks).
"I thought he'd be a bit dour when I made my run so I popped out early," Pike said.
"But he accelerated so well and he covered the field that fast.
"I really thought I was in danger of being in front for too long and being run down, but as you can see by the margin he was far too good."
Action is the eighth WA Derby winner for Bob and Sandra Peters.
"He's a very nice horse," Bob Peters said.
"I'm very lucky really because I entered him in a sale and the agents didn't want to put him through, so I finished up owning him.
"William was brave. He took off early and went wide, but obviously the horse was ready for the race.
"It's a good performance considering the margin."

Broadway Belle has a weanling colt by Vancouver and was covered last spring by American Pharoah (USA).
Action is the eighth stakes-winner for Lonhro's champion son Pierro, who stands this spring at Coolmore at a fee of $88,000.