Stardew aquatic animal is a valuable catch in the Stardew Valley game. This heart eel can be found in the creek during stormy days and at night. If you manage to catch a Cosmic heart fish, you can sell it for a handsome profit. In addition to its monetary value, it is also coveted by fishermen for its captivating charm. So, grab your tackle box and head to the streamside to try your luck at hooking this Stardew eel. Happy fishing!