The humpback whales come to Tonga to have their babies! Humpback whale calves don’t have enough fat in their bodies to survive the cold Antarctic waters. So their moms travel to the warm waters of Tonga to give birth. The waters of Tonga suit Humpbacks due to the deep protected waters around the island chain. This make it perfect for us to see them in calm idilic situations – much better than the freezing windy environment of the arctic oceans
Tonga doesn’t have much food for humpback whales. In fact, the humpbacks don’t eat much at all while they are visiting Tonga. They need to return to the Antarctic as soon as the calves are strong enough to survive the trip, so the adult whales can eat. A whale mom may lose 25% of her body weight during her visit to Tonga!