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