Cosmic heart eel is a valuable catch in the Stardew Valley game. This heart creature can be found in the river during wet weather and at night. If you manage to hook a Cosmic heart fish, you can sell it for a good price. In addition to its monetary value, it is also coveted by fishermen for its ornate beauty. So, grab your tackle box and head to the streamside to try your luck at capturing this Galactic love creature. Happy fishing!