A giant algae bloom off B.C.'s South Coast has turned the normally blue ocean green.
It's so large, it's visible from space.
The water in Howe Sound is so green, it's easily visible to the naked eye, leaving boaters and ferry passengers to wonder what's going on.
"I'm going for a swim in it later. Hopefully, it doesn't eat me alive," one observer told CTV, jokingly.
Last year, a huge bloom of toxic algae temporarily shut down fisheries in the region, but experts say this algae doesn't pose a threat.
The colour is caused by tiny phytoplankton called coccolithophorids, according to Nicky Haigh of Vancouver Island University's Harmful Algae Monitoring Program.
"This is an unusual bloom to be seeing in the Strait of Georgia. We usually see different species… We're not really sure why they're blooming in this area."
They're more common off the west coast of Vancouver Island, but are rarely seen closer to the mainland.
Slightly higher acidity in the water may be behind their move as waters with a lower pH can encourage their growth.
– with files from CTV Vancouver