Oh, thank you! I am now past my middle age, but I so remember as if it were yesterday, the day when I was not more than 7 years old. A completely isolated small puddle of water, all that remained after few days rain and then Sunshine. I stepped on it, creating small waves and a couple of fish emerged writhing on to the dry surface. No one could answer how they came about. All my 7 year brain could think of then was some bird must have dropped them by accident. And now I have the answer!