Timmy was first spotted swimming in the region on March 3. It is not clear why the whale swam into the Baltic Sea, far from its natural habitat in the Atlantic Ocean.
A whale was spotted breaching on the Atlantic Ocean in New Hampshire and capsized a boat that was carrying at least two passengers.
The North Pacific right whale is critically endangered; according to NOAA's website, there are likely fewer than 500 remaining.
The National Parks Service, Cape Hatteras National Seashore, said the skull measured roughly three feet wide and two feet tall.
The nearly 50-foot yacht, named The Alboran Cognac, was 15 miles from Cabo Espartel in Morocco when an unknown number of orcas began ramming it.
Police and wildlife officials began trying to free the stranded whale in Venice, Florida, but the attempts were unsuccessful due to unsafe water conditions.