Wondernose: What animal has no head and no legs, yet weighs a quarter of a ton?

Wondernose: What animal has no head and no legs, yet weighs a quarter of a ton?

Giant clam. Photo © Dreamstime.com. Mind you, Wondernose, not all the animals of this kind weigh a quarter of a ton. They can vary in size from a fraction of an inch to four feet across.But how, you wonder, will such an animal get around if it has no legs? The answer...