Players can earn Halibut Harpoon Mastery in Fisch by completing four quests, from catching limited-time fish to finishing the Terminus mini-game, which requires reeling in 25 Hunt Fish. Halibut Harpoon Mastery provides a permanent weight boost, increased bait preservation & better progress for the Rod, and cosmetic goodies.
Halibut Harpoon Mastery is one of the most challenging quests in Fisch, as the associated tasks come as riddles instead of simple objectives to follow & finish. So, if you want the Halibut Harpoon in your equipment inventory and want to make it more powerful, this guide will help you finish it.
How to get the Halibut Harpoon Mastery in Fisch
Below are the four individual objectives you must complete to finish the Halibut Harpoon Mastery in Fisch.

500 Suggestions
- Riddle: I'm blue on special occasions. (0/5)
- Answer: Catch any 5 Fisch 2nd Anniversary Event Fish with the Hadal, Thalassic, or Bathyal Mutation
- Reward: Limited and Special bait can be used in Enhancement for Halibut Harpoon and Terminus Fragment x1
These are Pufferfish
- Riddle: We're making up rules, so the rod requirements should be its appearance? (0/3)
- Answer: Catch all three halibut in the game: Halibut, Greenland Halibut & Hoarfrost Halibut with the Hadal Mutation. Use the table below to know the location, bait, timing, season & weather requirements to reel in the fish.
| Name (Rarity) | Location | Bait | Timing | Season | Weather |
|---|---|---|---|---|---|
| Halibut (Rare) | The Ocean / Deep Ocean | Squid | Any | Spring, Summer | Rain |
| Greenland Halibut (Rare) | Boreal Pines | Worm | Any | Winter | Any |
| Hoarfrost Halibut (Legendary) | Challenger's Deep | Fish Head | Day | Winter | Clear |
- Rewards: Dreaming Pufferfish Super Halo, "Hedgehog" Title, and Terminus Fragment x1
They Fly Now
- Riddle: Bring the depths to those that fly the highest! (0/1)
- Answer: Catch 1 Wyvern with the Hadal Mutation. I recommend getting the Long Enchant on your Halibut Harpoon Rod to increase your Resilience, Line Distance & Progress Speed against this tricky fish.
| Name (Rarity) | Location | Bait | Timing | Season | Weather |
|---|---|---|---|---|---|
| Wyvern (Exotic) | Above The Clouds | Truffle Worm, Starlight Worm | Any | Any | Rain |
- Rewards: Puffish Balloon x1 and Terminus Fragment x1
Terminus
- Riddle: Complete the Terminus Challenge with Halibut Harpoon without any Companions or Gloves equipped (0/1)
- Answer: Combine all three Terminus Fragments in your inventory to make the Terminus Item. Use the Item to enter the Terminus mini-game, where you must catch x25 Hunt Fish in a row without a break. Emerge victorious to get the Halibut Harpoon Mastery.
- Rewards: Terminus Lantern
Remember: throughout the quest, you must equip the Halibut Harpoon in rod mode instead of the default Harpoon. Otherwise, the game won't count your progress, and you'll have to restart certain parts.
Fisch Halibut Harpoon Rod Mastery Passives
If you complete all 4 quests above, you will get the Halibut Harpoon Rod Mastery, which provides the following Passives to its users.
- You will get either a 25% or 35% weight boost while fishing with the Rod.
- Reduce the 2 Second Progress Lock while fishing to 1.5 seconds.s
- 50% chance to preserve your bait instead of the default 10 seconds.
Along with these passives, you will also obtain the exclusive Flak Kraklening Skin for the Rod.
For more on Fisch, check out Complete Fisch Dreambreaker Rod Mastery Guide or Complete Fisch Astraeus Serenade Mastery Guide