Categories TTW In Focus: Oceans, Seas, Rivers, Lakes single-image category Humpback whale calf (Megaptera novaeangliae) with mother in background, Vava'u, Kingdom of Tonga, South Pacific. Summer 2006. Humpback whales are baleen whales. Migrate to cold water feeding grounds during the summer, then to warm water breeding grounds in summer. Post author By TPOTY Post date 5th July 2019