Marlin Harpoon

This is a unique, sentient weapon owned by Isari Funato.

Overview
While dormant, it normally appears as a marlin-shaped skeleton atop a pole, akin to a spear. Upon awakening, it becomes enlarged and more akin to a full-bodied marlin, metallic in structure. In either form, it is easily capable of piercing through and destroying rock and steel. When transformed, it also as the ability to freely fly though the air in the same manner as a fish would swim. Similar to the Seven Ninja Swordsmen of the Mist's Samehada, this sword is able to quickly consume chakra on contact — even from complex techniques like the Rasengan — and will take a liking to particular chakra.