Cosmic love fish is a valuable catch in the Stardew Valley game. This creature can be found in the stream during stormy days and at night. If you manage to catch a Cosmic heart fish, you can sell it for a good price. In addition to its price, it is also coveted by anglers for its exquisite appearance. So, grab your angler gear and head to the riverbank to try your luck at catching this Cosmic heart fish. Happy fishing!