Herabuna

The Herabuna is a fish that only appears in and. It can be found in the River Pool at any time of the day and year, but its peak months are March, June, and August to September. They are similar in size to the Crucian Carp and share the same in-game sprite, suggesting that these are actually the same fish.

Further Information
The popular name for this fish in America is "Japanese Crucian Carp" or "White Crucian Carp". They live in Asia.