Cosmic love fish is a valuable catch in the Stardew Valley game. This lovable eel can be found in the creek during rainy weather and at night. If you manage to catch a Cosmic heart fish, you can sell it for a good price. In addition to its monetary value, it is also in demand by anglers for its ornate beauty. So, grab your tackle box and head to the creek side to try your luck at hooking this Cosmic heart fish. Happy fishing!