This 22" x 34" poster depicts scaled drawings of the West Indian manatee, the West African manatee, the Amazonian manatee, and the dugong, which are the only four remaining sirenians in the world - PLUS the extinct Steller's sea cow. Pieter Folkens is a well know marine mammal artist, who creates posters for the Society for Marine Mammalogy, The National Marine Educators Association, and several museums around the world.