Belugas come together in pods of hundreds and even thousands of individuals in the shallow waters of the arctic and sub-arctic seas. For insulation in these cold waters these whales have 10cm thick blubber and half their weight is fat. Beluga whales are very vocal: their chirps, squeaks and clicks are so distinctive they're nicknamed 'sea canaries'.

Blue whales are the largest animals ever to have lived - bigger even than the largest of dinosaurs. These jumbo-jet-sized giants inhabit the open ocean. A single calf is produced every two to three years, and from birth each calf consumes up to 50 gallons of milk every single day, leading to a colossal weight gain of 90 kilograms per day in its first year of life.

Orcas are actually the largest species of dolphin. Their dorsal fin can be used to recognize individuals since each has a unique shape. Orcas are sometimes called Killer whales because they feed on larger animals like seals and penguins. They have sharp teeth, rather than the baleen that many whales have. They are the fastest sea mammal, reaching speeds of up to 55kph.

Humpback whales are known for their magical songs, which travel for great distances through the world's oceans. These whales are found near coastlines, feeding on tiny shrimp-like krill, plankton, and small fish. Humpbacks travel from summer feeding grounds near the poles to warmer winter waters closer to the Equator. Baby Humpbacks do not stop growing until they are ten years old.