Flatfish can be acquired by Fishing in Stage 1 and Stage 2.
Stage 1[]
Flatfish can be acquired by Fishing with a Rough Fish Pole (or better).
Action[]
- Eaten using the EAT menu for 20 stamina
- Turned into 2 Fillet of Fish and 2 Fishbone by using a Wooden Knife (or better) from the TOOL menu on it
Stage 2[]
Flatfish is a 1 star tier item obtained through Fishing in any ocean with Bad fish pole (or better) with Nut (or any better bait).
Action[]
- Eaten using the EAT menu for 20 stamina
- Turned into 2 Fillet of Fish and 2 Fishbone by using any knife from the TOOL menu on it