Stardew eel is a valuable catch in the Harvest Moon game. This lovable creature can be found in the river during rainy days and at night. If you manage to hook a Cosmic heart fish, you can sell it for a good price. In addition to its worth, it is also in demand by fishing enthusiasts for its captivating charm. So, grab your fishing rod and head to the creek side to try your luck at hooking this Cosmic heart fish. Happy fishing!