Mystic Aquarium announced Thursday that at least one of the three whales seen in Narragansett Bay in May has arrived safely back in Canadian waters. 

“One of the three belugas that visited our response area this summer was spotted in Cape Breton, Nova Scotia, Canada, on Tuesday,” Allison Tuttle, vice president of biological programs at the aquarium, said in a news release. 

The belugas originally were spotted in Rhode Island on Mother's Day by local fishermen.

The three whales were positively identified after Mystic Aquarium’s researchers, under the direction of the National Oceanic and Atmospheric Administration Fisheries, were able to collect still images and video footage of the three marine mammals, the aquarium said.

Images were shared through a partnership with the Quebec Marine Mammal Emergency Response Network. 

Robert Michaud, scientific director of the Group for Research and Education on Marine Mammals and coordinator of the Quebec Marine Mammal Emergency Response Network, was able to photo-identify one of the beluga whales as part of the threatened St. Lawrence population.

“It is a relief knowing that at least one is back in Canada after its travels,” Tuttle said.

The hope is that all three continued to travel as a group, and that the others are there as well, the aquarium said.

The trio had traveled as far south as New Jersey on May 31.