Stardew Valley Eel Guide All You Need To KnowGalactic heart fish is a valuable catch in the Harvest Moon game. This lovable fish can be found in the river during rainy days 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 price, it is also highly sought after by fishermen for its captivating charm. So, grab your angler gear and head to the riverbank to try your luck at hooking this Stardew eel. Happy fishing!