** The blue whale is the largest creature that has ever lived on Earth. The biggest recorded blue whale was a female whale in the Antarctic Ocean. This was about 30 metre long and weighed about 144 tonnes.
** The North Atlantic and North Pacific right whales are one of the most endangered whales. There are only about 400 individuals that currently exist, with just over 100 North Pacific right whales remaining.
** The humpback whales make one of the longest known migration of any mammal. They feed in the Antarctic waters and swim north to breed off the coasts of Colombia, Panama and Costa Rica.