The North Pacific Ocean is setting record high temperatures this year and raising concerns about the potential impact on cold water marine species along the B.C. coast, including salmon.

Ocean surface temperatures around the world this year reached the highest temperature ever recorded, due in large part to the normally chilly North Pacific, which was three to four degrees above average — far beyond any recorded value.

Pacific record temperatures

Dr Richard Dewey with Ocean Networks Canada says scientists are still trying to figure out what's going on. (CBC)

​Bill Peterson, an oceanographer with the U.S. National Oceanic and Atmospheric Administration, said the warmth along the North Pacific coast is very unusual.

"We've never seen this before. It's beyond anyone's experience and this is why it's puzzling," he said.

To further complicate the picture, Peterson says an El Niño warm water ocean current should arrive in about a month.

"We'll have what we call a double whammy," he said. "It's already very warm up north, up here. If we get an extra push of super warm water from the tropics, we could possibly have a big disaster on our hands, ecologically speaking."

Invasive species on the rise

Richard Dewey, an associate director with the ocean observatory operator Ocean Networks Canada in Victoria, said scientists are still trying to figure out what's happening.

Sunfish - Pacific Ocean temperatures

A Sunfish, normally found in temperate and tropical waters caught by fishermen off the Alaskan panhandle. (CBC)

Unusual and invasive species have already headed north including:

  • Sunfish, normally found in tropical or temperate waters, which have been seen off the Alaska panhandle.
  • Thresher sharks, which rarely travel past Vancouver.

There's also concern that Humboldt squid, which voraciously eat juvenile salmon, could make their way north again, after first being spotted off Alaska in 2005.

"So the worries with this is our local species having to work harder," Dewey said. "They're competing for the food they're after."

With files from the CBC's Eric Rankin