So i placed the koi pond down on one of my up and coming sims lawn. She would go out and feed the fish and view them. I did notice in the pie menu, "jump in". I ignored it, but decided to try it some time later. I had my sim jump in and she sunk like a rock, bubbles were coming up and then was told that she was drowning, what the heck. She lived by herself, so after the grim came, of course it took me back to the neighborhood. I never thought that she would drown and I have read where this has happened, which it probably has, but, just remember, just feed fish, do not jump in, lol.