Humpback whales are surely the happiest animals in the sea. Just watch their fantastic acrobatic somersaults as they jump high out of the water! Since 2003, humpbacks have been spotted more often in the southern North Sea. You can recognize them easily by their large, somewhat clumsy body, long flippers, pockmarked flat head and typical fluked tail. Not necessarily what you would call mother's little beauty, but still very majestic. Male humpbacks produce lovely songs. They can last up to 45 minutes and resonate for kilometers. The song consists of whistling, grunting, groaning, snorting and crying.