The easiest method of obtaining food is by fishing. You can make a fishing spear by cutting a small sapling and employing several pieces of wire to fashion a pronged fishing spear. Sharpened wooden spears even though they work often crush smaller fish, which ends up in losing the fish.
Cut 3 or 4, 15 cm pieces of wire and using another section of wire to secure the pieces to the end of stick between 1.5 and 2 meters long. This provides you with a pronged end that will pierce and secure the fish with no damage to edible parts.
You can divide the end of the stick and put in the wire for a better hold. Wrap wire around the split end to secure the prongs in place. Attach the spear to your wrist with sufficient cordage to keep from losing the spear after thrusting.