A post shared by Frank Lin (@fylegend21)Lin and the others rushed to the waterfront and photographed a pod of five orcas breaching the surface repeatedly.Lin, 28, has had an Instagram account dedicated to wildlife images since 2016 but he says he’s never seen orcas breaching in Vancouver’s urban waters before.Andrew Trites, director of the Marine Mammal Research Unit of the University of British Columbia’s Institute for Oceans and Fisheries, says the whales seen by Lin were transient orcas and he believes their appearance near Vancouver will become more frequent.Trites says the last few decades have seen a rise in the population of harbour seals, many of which gather in waters near Stanley Park.A post shared by Frank Lin (@fylegend21)He says harbour seals are one of the transient orcas’ prime food sources and pods are increasingly drawn to the seals in Vancouver’s waters.Trites says boaters need to “keep their eyes open” to avoid a catastrophic collision as orcas appear more frequently in crowded waterways.Lin says his team was “stunned” by the Feb.