Look at it, just staring emptily with those round lidless eyes, mouth opening and closing with not a useful thing to say. Regardless of Rey's feelings about the fish, she never wished ill of it. It's not the fish's fault that it's so inept to do anything. So Firo's question is met with a bit of misgiving.

"Enough that it's still alive after all this time and not drained down the toilet."

That's where all the unwanted fish of the world go, isn't it?