Question: what is the difference between a female and male killer whale?
Answer: Male orcas are much larger and heavier than females, growing as long as 32 feet and weighing 11 tons, while females grow up to 28 feet in length but tip the scales at 7 tons. ... Since it takes up to 20 years for the dorsal fin of males to "sprout" to full size, a young male can be mistaken for an adult female.