Adamant harpoon

A Adamant harpoon is a tool used for harpooning fish in the fishing skill and is capable of catching 80% more fish than a regular harpoon. It requires an attack level of 40 wield, but a fishing level of 31 to use. The harpoon can be smithed using the smithing skill at level 73 smithing, using 1 adamant bar on an anvil. The harpoon may also be gained as a drop from Celestial water warriors as an uncommon drop, but there's very high leveled requirements to fight these creatures.