Orvis has pliers designed specifically for saltwater use. The Orvis Hydros Aluminum Pliers are lightweight and durable and come in Ocean Blue.
“Crafted of rugged and super-lightweight T6061 aircraft aluminum stock with cutters made of AUS-8 stainless steel with a grooved pattern for the greatest durability and cutting power without the weight. Cuts Spectra™-based lines, mono, and wire easily, and they’re corrosion resistant. The ergonomic grip fits the hand perfectly for a non-slip grip even with wet hands. In your choice of two popular sizes. Both handle the toughest cutting and hook-removing jobs. Ocean-blue pliers are 7½” long with stainless-steel cutters, rounded jaws. Olive freshwater pliers are 5½” long with stainless-steel cutters and needle-nose jaws. Sheath and coil lanyard included with purchase of the pliers. Each comes with replacement cutters, wrench, and screws in the package.”