Stardew heart fish is a valuable catch in the Stardew Valley game. This lovable creature can be found in the stream during stormy days and at night. If you manage to hook a Cosmic heart fish, you can sell it for a handsome profit. In addition to its worth, it is also in demand by anglers for its ornate beauty. So, grab your fishing rod and head to the streamside to try your luck at hooking this Stardew eel. Happy fishing!