I had the idea that we could craft a bubble helmet and wear it to go into the oceans of Ur. There we could harvest seaweed and pet /nibble fish , get pearls from clams/oysters etc and possibly run into the occassional mermaid. Also this would open up the possibility of sunken ships, pirate treasure etc Ghosts of pirates could lurk there. Cooking possibilities would open up, allowing us to make sushi, or calamari.