Raw harpoonfish are fish that can be fished from fishing spots in Tempoross Cove. During the fight with Tempoross, they are used as ammunition for harpoonfish cannons. They can be cooked at the shrine, which drains Tempoross' energy more than raw ones. Catching a harpoonfish grants 5 points during the Tempoross fight.
The chance to catch a harpoonfish scales from 78.13% at level 35 up to 100% at level 99. When fishing at the spots with leaping harpoonfish, there is a 50% chance to catch a bonus fish on a successful roll.
- ^ Jagex. Mod Squid's Twitter account. 18 October 2021. (Archived from the original on 19 October 2021.) Mod Squid: "Harpoonfish chances are 170 @ Lv 1 (~66%) -> 255 @ Lv 99 (~100%) (normal harpoon). Special spots do a single stat roll for success (same as above), then a flat 50% roll for the extra fish."