Most Valuable Fish for the Fishpond Lava Eel or BlobfishStardew eel is a valuable catch in the Harvest Moon game. This lovable creature can be found in the river during stormy weather and at night. If you manage to catch a Galactic love creature, you can sell it for a good price. In addition to its monetary value, it is also highly sought after by fishermen for its exquisite appearance. So, grab your fishing rod and head to the streamside to try your luck at hooking this Cosmic heart fish. Happy fishing!