Tropical species in Puget Sound a mystery
The unusual visit last week of two long-beaked dolphins to waters outside Olympia was just the latest in a string of strange animal sightings in and around Pacific Northwest waters. Lots of creatures that at first glance might not seem to belong have found their way here in recent years. 
By Craig Welch, Seattle Times environment reporter
27 June 2011 There was the brown booby, the plunge-diving tropical seabird that inexplicably hopped aboard a crab boat this spring in Willapa Bay. And fishermen have caught spear-snouted striped marlin off the Washington coast and a 6-foot leopard shark in Bellingham Bay. The shark, in particular, is hardly ever seen north of Coos Bay, Ore. Even Bryde’s whales, which normally range from Chile to northern Mexico, have washed up dead on southern Puget Sound beaches. Twice. Just since early 2010. The unusual visit last week of two long-beaked dolphins to waters outside Olympia was just the latest in a string of strange animal sightings in and around Pacific Northwest waters. Lots of creatures that at first glance might not seem to belong have found their way here in recent years. The reasons are as diverse as the beings themselves. Green sea turtles that wind up stranded on Washington beaches often are presumed to have ridden warm-water currents up from California during El Niño years. Once they land in the cold Northwest, they grow too lethargic to make it home or swim at all. Climate changes or other disruptions probably are driving some species to new homelands. Invasive critters are discarded in marine waters and sometimes take up residence. Birds can hitch rides on air currents — and, yes, fishing boats. […] “I think it’s a little bit past just being weird,” said Annie Douglas, a marine biologist with Cascadia Research. “With this many tropical species, I think it’s an indication of something. It’s just not clear what.” […]
