Discovery of intact shipwreck off Canada is ‘underwater mystery,’ officials say

It’s not uncommon to find lost ships when mapping the seafloor, but researchers found one no one knew was missing off Canada’s eastern coastline.

Fisheries and Oceans Canada noted the odd find in an July 30 social media post, referring to it as “an underwater mystery!”

“Our Canadian Hydrographic Service discovered an uncharted, seemingly intact shipwreck on Sydney Bight, off Cape Breton Island!” the department said.

“We found the shipwreck using sonar technologies which are used to understand how deep water is and to see the seabed. In this case, we saw something unexpected!”

The ship was discovered in May and is about 150 feet long, officials said. The depth was not provided, but a “navigational warning” is in place “to help mariners stay safe in the area.”

A mapping image indicates it is a modern vessel, with no hint of masts.

Hundreds of comments and reactions appeared on the department’s post within hours, with many guessing the ship’s origin.

“Probably part of the millions of tons of military equipment that was dumped off Cape Breton after WW2,” John Ca wrote.

“Could be smugglers, illegal fishing operation. Could be a lot of things,” Ryan Jones posted.

The Sydney Bight hosts a “clockwise gyre,” which is a type of rotating current. The bight is also known to have “ice present for 60 to 100 days per year on average, from January to the beginning of April,” government officials noted in a report.

Cape Breton Island is about a 530-mile drive northeast from Bangor, Maine.

This story was originally published July 30, 2025 at 3:57 PM with the headline "Discovery of intact shipwreck off Canada is ‘underwater mystery,’ officials say."