Stardew Valley Lava Eel All You Need To Know GuideStardew heart eel is a valuable catch in the Harvest Moon game. This heart creature can be found in the river during rainy weather and at night. If you manage to reel in a Cosmic heart fish, you can sell it for a good price. In addition to its monetary value, it is also highly sought after by fishing enthusiasts for its ornate beauty. So, grab your tackle box and head to the creek side to try your luck at catching this Galactic love creature. Happy fishing!