The Halibut Harpoon is a unique piece of equipment in Fisch that allows players to use it as a regular fishing rod and a harpoon gun at will. To acquire the item, players must visit Dr. Monty and finish a set of quests offered by the NPC. If you are wondering how to start and complete the quest, here is a detailed guide.
Where is the Dr. Monty NPC in Fisch?
To start the quest, you must talk with the Dr. Monty NPC, who resides in his secret laboratory. To reach his lab, go to the Depths POI. Once you are underground, go to the GPS location (461, -2002, -13150.2) in Outer Deep. Here, you can find a group of buildings.

Now, enter through the highlighted window of the first building, as shown in the image above, to enter Dr. Monty's laboratory. Once inside, you can find Dr. Monty next to a board. Speak with him to start the quest.
All Dr.Monty Riddle Questions & Answers

Before giving the quest, Dr. Monty will ask a couple of questions that you must answer correctly to proceed. The table below contains all the questions Dr. Monty asks & the correct answers.
| Question | Full Answer |
|---|---|
| The goggobites gather for what? | Hubbermeisterchen |
| What is the base value of a Sparkling Shiny Aether Pufferfish? | 13,388.82 C$ |
| What is my favorite color? | Orange |
Note: We are continuously playing the quest and will update the article with more information as we progress.
For more on Fisch, check out All 21 Fish in the Outer Deep (100% Bestiary) – Fisch or All 22 Fish in the Lower Deep (100% Bestiary) – Fisch