Sight of love human boy and fish girl

Part -1 Begining of the story Long time ago in the earth there is no begin, only water surrounded entire planet. Few years ago there had a change in the sea level in the ocean started floating some kind of creatures they were called fish. And slowly they're had a changes in them they can talk,walk and they build there house in the ocean. There were different kind of spices in the ocean they were countless, and they had great time.,