Population outbreaks of the coral‐eating starfish, Acanthaster planci , are hypothesized to spread to many localities in the Indo‐Pacific Ocean through dispersal of planktonic larvae. To elucidate the gene flow of A. planci across the Indo‐Pacific in relation to ocean currents and to test the larval dispersal hypothesis, the genetic structure among 23 samples over the Indo‐Pacific was analysed using seven highly polymorphic mi...