The resort is a popular destination for hikers and whale watchers from around the world.
At this time of year, tours leave from Tofino daily at 1.30pm. According to the company’s website, trips on the Leviathan II cost up to £70 per person.
The cruiser had three decks offering excellent views and allowing the option of sitting inside or outside.
A boat operated by the same company also sank near Tofino in 1998, resulting in the death of a German tourist and the boat’s captain.
John Forde, who works at another eco-adventure company, said passengers on the Leviathan II would not have to wear life jackets.
The boat, like ferries, would only be required to have life jackets on board.
The vessel sent a distress signal around 5 pm local time, according to a spokesman for the Joint Rescue Coordination Centre (JRCC).
Several other coast guard vessels were involved in the search.
“There were four people recovered without vital signs and the search continues for people still unaccounted for,” the spokesman said.
The search was called off last night.
The Canadian Broadcasting Corporation, citing BC Ambulance, said four people were taken to hospital and five were being treated after being pulled from the water.
The manager of the Shelter Restaurant in Tofino said fishermen and fishing charter companies had joined the rescue effort, with about 15-20 boats leaving the tourist town.
“Practically anyone who can go will go,” said Matthew, who did not give his last name. “People here get together to help when things like this happen.”
The area is popular for whale-watching.
“All our attention now is on our passengers and crew so we’ll be providing information as soon as the time is appropriate,” said a staff member with Jamie’s Whaling Station and Adventure Centres.
The Transportation Safety Board of Canada said it would send a team to Tofino to investigate.
