Bluegill

The BlueGill is a species of fish found in Red Dead Redemption II.

Description
According to the compendium in game "Bluegill is a small freshwater fish, often preyed upon by Muskie and bass. They are easily caught using food bates, such as cheese. Bluegill prefer open water and are found in lakes and rivers all over the country. They are particularly active during rain. Fishermen around Scarlett Meadows tell tales of a Legendary Bluegill"

According to the compendium in game "You are most likely to catch these fish with cheese bait"