This news item from CBC reports on the tragic death of five right whales all from the Gulf of St. Lawrence over the past few weeks. Canadian and US scientists are working in collaboration to document the event and determine the cause of death.
http://http://www.cbc.ca/news/canada/new-brunswick/six-dead-right-whales-1.4176832
Featured Bycatch Species

Although it is believed that the harbor porpoise population is not seriously in danger at present, incidental catch of the species in gillnets continues to be the primary threat throughout it