The answer would be Person Vs Person because the fishermans wife just wanted more and more from him not thinking about him at all just herself...and there was no other charater in the story but the fish, but the fish was giving the man gifts so he wouldn't be the problem so the wife was the conflict in the story that's why it would be Husband Vs Wife.
I hoped this helped!
Have a great day/night! :)
Not sure but can you give more details
Cause the diseases i think thats why