Same way asparagus make urine smell?[...]
Some people says it's also related to what you eat as well due to how your odor becomes. That might be the reason of fish odor as well.
I don't know. I don't have enough unnecessary medical knowledge to verify that. A few things I do know about urine is what can affect it's color. Excess vitamin intake will go to your piss making it a bit yellow and I remember the alkalinity of the water you consumed can also effect as well. There's also how much water you consume as well.Same way asparagus make urine smell?