An adult humpback weighs about 30 tons ​ — as much as a loaded truck — ​ and it has a relatively stiff body with large winglike flippers. This 40 - foot - long [12 m] animal is remarkably agile under water.
प्रौढ हंपबॅक देवमाशाचे वजन जवळजवळ ३० टन, म्हणजे, माल भरलेल्या ट्रकएवढे असते.