How did sand dollars get their name?

Answer 1

At first it was not known that the sand dollars are living things. People thought (myth) it was like a large coin and that it was the coin/dollar used by the sea mermaids. It was found on beach sands. hence the name sand dollars.

Answer 2

children in Maine use to think that sand dollars were money that mermaids used

Answer 3

because it lives in the sand and it is green alive and white dead

Answer 4

there like made of sand bro...