I used to believe that fish come from the earth. I was somewhat a dense child, I didnt realise they come from heavy deglaciated comets, passing through the nagaso belt, just one mile above the o-zone layer. I mean it's pretty obvious when you think about it. The deglaciated ice fass through the earth, embedded with the charged negative reactions from the nagaso belt, fusing the bio-mantle into living organisms, which then happily fall into water such as oceans or lakes.