A good name for a pet fish is Sushi. Sushi is a popular fish name and it is appropriate for both male and female fish. It is also very humorous, as the Japanese food sushi is typically made with raw fish.
When deciding on a name for your pet fish, or any other type of pet, consider observing it before giving it a name so that the name suits its personality or physical apearance. Some people name their pet after a dominant character trait or speciic type of behaviour that it exhibits. For example, if you have a fish that moves around quickly, you may want to call it Speedy or Dart.