The
humpback whale (
Megaptera novaeangliae) is a species of
baleen whale. One of the larger
rorqual species, adults range in length from and weigh about . The humpback has a distinctive body shape, with long
pectoral fins and a knobbly head. It is known for
breaching and other distinctive
surface behaviors, making it popular with
whale watchers. Males produce a complex
song lasting 10 to 20 minutes, which they repeat for hours at a time. Its purpose is not clear, though it may have a role in mating.