The 9-inch Flex Fillet Knife is the ideal candidate for filleting your Tuna. This knife does it all. Its semi-flexible blade is more lenient than the 9-inch Stiff Fillet Knife. The knife comes fully loaded with its classic non-slip-grip handle and non-stick Teflon coated blade. Its full-tang construction includes a razor-sharp edge that meets your standards. Offer this knife to your buddies, and you'll be the king of the boat.