The fisherman and his wife
In the story the fish tell the fisherman "please let me go".
Infer I think the fish said that because she knew she was about to be eating .
The fisherman said "Id let a talking fish go anyway.
Infer I think the fisherman let the fish go because he don't want to eat a talking fish
The fisherman wife ask him did you make a wish
Infer I think she ask him that because if the fish can talk she got some kind of magic.
He let the fish swim away
Infer I think he let the fish go because the fish talk