As Julie stated, on the west coast it's done by the federal government.
On the east coast, they use a network of mostly conservation organizations that do that. They mainly get contracted to set up the hotline. These typically serve fishermen who might find a large mammal, or the Canadian population that finds any type of marine animal in distress. It could be beached. It could be stranded. It could be entangled. It could be dead.
They call the hotline that is usually set up by these networks, and then they go and respond. Sometimes the response could be as simple as dealing with a seal in a Tim Hortons parking lot in Newfoundland—