They migrate south to Florida and Georgia during the winter from Canada and Cape Cod for the warmer water.
Researchers believe there are fewer than 450 North Atlantic right whales living, according to the National Oceanic and Atmospheric Administration Fisheries.
There have been four other sightings this year, including:
Boomerang, right whale No. 2,503, was seen with calf Jan. 25 off Jekyll Island, Georgia
Right whale No. 1,204, was seen with calf Jan. 17 off Amelia Island, Florida
Right whale believed to be No. 3,317, seen with calf Jan. 13 off Ponte Vedra Beach, Florida
Right whale No. 2,791, was seen with calf Jan. 6 off Amelia Island.