Two more calves have been spotted off the coast of Amelia Island in Florida, increasing the total number of calves seen this season to 11, according to the National Oceanic and Atmospheric Administration.

North Atlantic right whales are critically endangered. The park service says only about 360 of the animals are still alive and about five or six calves are born each year.

Scientists found plastic debris in the digestive tract of a southern right whale stranded in Argentina, according to a study from the Southern Right Whale Health Monitoring Program, co-led by the University of California, Davis, School of Veterinary Medicine; and Instituto de Conservación de Ballenas in Argentina.

A member of a species of critically endangered whale that is struggling with poor reproduction has been found dead off of Massachusetts.

But an Icelandic whale-watching crew spotted the right whale named Mogul three times this week, leaving a research scientist wondering why the animal ventured so far.

The first right whale of the season has been spotted in Canadian waters after an unprecedented winter in which not a single calf was spotted.

Scientists are at a loss to explain one of the biggest mysteries surrounding the critically endangered North Atlantic right whale.

Biologists were able to collect valuable data on these rare animals during a special whale survey in August.