儒艮的典型重量约为 400 千克。原文摘录(英文):The manatee’s weight can range from 440 to 1300 pounds and can be anywhere from 8 to 11 feet long, fully grown. These gentle, graceful water giants are known as “sea cows.” The three species of manatees are the West Indian manatee, the Amazonian manatee, and the African manatee.