The Marttiini Martef Filleting Knife 23 is a dedicated, flexible manual cutting tool engineered for processing and skinning medium-to-large ocean and freshwater fish. Featuring a 23 cm blade with a slim 1.8 mm spine, the knife flexes along the ribcage and spine to cleanly separate skin, flesh, and bone without tearing delicate fillets. Its stainless steel blade is hardened to ~54 HRC and finished with Marttiini’s proprietary Martef low-friction coating, which reduces drag during continuous slicing passes while shielding the steel against saltwater corrosion.

Key Features

• Low-Friction Martef Coating: Reduces cutting drag to near zero, preventing flesh from sticking to the 2.7 cm wide blade while providing surface protection against fish slime and saltwater corrosion.
• Flexible Slim-Spine Geometry: Features a thin 1.8 mm spine that contours closely along the fish skeleton to maximize yield when removing fillets and skin.
• Wet-Grip Textured Handle: Built with blue roughened rubber, a flared rear pommel, and an integrated finger guard to ensure slip resistance when working with wet, slimy, or bloody hands.
• Lightweight Handling: Weighs 113–120 g (knife only) to reduce wrist fatigue during extended cleaning sessions, and includes a protective black leather sheath with belt loop (total carry weight of ~187 g).

Product Specifications

• Blade Length: 23 cm (measured edge-to-shank between 22.2 cm and 22.7 cm)
• Overall Length: 36 cm
• Blade Thickness: 1.8 mm
• Blade Width: 2.7 cm
• Blade Material: Stainless steel (~54 HRC) with Martef non-stick coating
• Handle Material: Textured blue rubber with integrated guard
• Knife Weight: 113–120 g
• Total Weight (with Sheath): ~187 g
• Sheath: Black leather with internal protective liner and belt loop

Who is the Marttiini Martef Filleting Knife 23 for?

• Anglers targeting large ocean and freshwater species — requires the 23 cm blade length and flexible 1.8 mm spine of this flexible saltwater fish filleting knife to trace the long skeletons of larger fish without sawing or tearing the meat.
• Hunters processing soft cuts of game meat — relies on the Marttiini Martef Filleting Knife 23 for delicate slicing and trimming tasks where the lightweight 113–120 g balance and non-stick Martef-coated 54 HRC stainless steel blade minimize drag along soft muscle tissue.

Less suitable for: Fish species under ~30 cm where a shorter 15 cm or 19 cm fillet knife provides better tip control, or for chopping through heavy skeletal bones, joints, and frozen meat, which require a rigid boning knife or cleaver.