Wriggly-Ugly
Krune looked at the skin of the fish he recently killed, stretching it a bit to see its toughness. He then nodded as he muttered, "This can work."
Not long after doing that, he began stitching it on the platform he had made using the body of the worm-like fish, making it flatter and even. Unsurprisingly, he was slowly but surely turning it into a boat, little by little using the flesh, bones, and skin of the fishes he obtained.
He was primarily using the bones of the large fishes he had hunted over the month to form the walls of the boat. He then filled them with the flesh of the fishes he had caught, those whose taste he didn't like but had obtained in excess.
Once he made sure to fill in between the bones, Krune used the tendons of a couple of tough fish varieties to tie them together. He then sewed the skin of the fishes over them, giving the entirety a rigid texture.