Pictured below is a family of manatees, aquatic mammals known as the "sea-cows". Besides the four whose presence is evident in image are hiding 11 other manatees. Try to find them all.
Take a good look at the image below. How many circles you see? Or do you see none?
If you think that the image contains only rectangles, you are wrong. In it there is no more than 16 rounds. If I cannot see them, look at the bottom edges of each