Okay, this has puzzled me for some time now--ever since I was little actually. How is it that in a shallow duck pond, which completely freezes solid during winter months, thrives a multitude of fish every spring? We also find the same fresh water fish species in ponds across the country (I think) so this means the fish manage to somehow travel..many miles across land to reach these different water environments! After puzzling over this, my guess is that fish eggs cling to the feathers of water birds, which cary them like bees to different water holes. ...And maybe this is why most fish lay eggs rather than bear live young? Lol, what do you think of this?