A calf imitates its mother swimming upside down. The sperm whale (Physeter macrocephalus) is the largest of all the toothed cetaceans. Males can reach 60 feet in length. Photographed in the Indian Ocean off the coast of Sri Lanka, Sri Lanka

horizontal animal color colour mother teaching sea underwater swimming learning tourism tropical mammal fin whale endangered calf imitation offspring calves pectoral whales cetacea vertebrate upside down tropical climate animal family young animal mammals full length role model chordata mammalia baby animals baby animal tourist attractions vertebrata attractions destinations animal behaviour animals marine life blue nobody attraction destination travel animalia ocean young animals four animals imitating color image role models vertebrates water sea life tourist attraction travel destination travel destinations animals in the wild adult animal place of interest indian ocean sri lanka colour image no one no people endangered animal endangered animals animal families adult animals female animal physeter macrocephalus sperm whale underwater photography places of interest physeteridae physeter macrocephalus female animals trinkomalee animal behaviours baby whale young whale young whales adult whale adult whales female whale sperm whales baby whales female whales