Harpoon a Fish Rare Fish Guide: Depth, Mutations and Pet Goals
Rare Fish Guide
- Answer: Deeper sinking opens opportunities to discover new sea monsters through character weight progression.
- Use it: The 2x Luck pass describes a mutation-chance bonus; that is distinct from a guaranteed species catch.
- Next step: Aquarium evolution develops a kept fish, while a missing index entry requires pursuing another collection target.
Choose which kind of rare goal you mean
A rare-fish goal can mean a new creature to catch, a mutation you want or a pet you intend to evolve. Give that goal a clear name before spending. Harpoon a Fish connects all three with fishing, but they do not ask for the same next action.
For a new deeper-water target, character weight is the relevant access progression. For a kept pet, the aquarium is where growth and evolution belong. For a mutation bonus, the official paid-pass wording supplies a specific chance effect. Keeping these goals separate prevents a vague desire for something rarer from turning every menu into the same purchase decision.
Use deeper access for the discovery goal
The developer explicitly describes getting heavier to sink deeper and discover new sea monsters. Work on the Mukbang table and eating interaction when the target you want is beyond your reachable water. Once you can reach the area, complete the ordinary aim-fire-reel sequence for the fish you choose.
Do not treat a new depth as a guaranteed rare reward. It gives the dive a new opportunity, and you still have a capture to finish. For your first trip into unfamiliar water, a manageable new species can be a useful result. You can build a later pet or collection goal from the catch actually brought home.
| Goal | Relevant action |
|---|---|
| Discover new deeper-water creatures | Develop character weight and reach. |
| Pursue a mutation bonus | Compare the specific mutation-chance pass effect. |
| Develop a kept pet | Use aquarium growth and evolution. |
Read the mutation boost for the effect it names
The official 2x Luck description says it doubles the chance of triggering a mutation when you harpoon a fish. That is a mutation-chance effect, rather than a promise that the next fish will be a particular rare species. A multiplier also does not state the underlying probability on its own.
Keep that paid purchase optional and connect it to the goal you actually have. If you primarily need deeper reach or a manageable first catch, a mutation-focused pass may not be the thing you want to buy now. The gamepass comparison separates the listed effects and current sale status so that a purchase has a specific purpose.
Develop the fish you decide to keep
The aquarium gives caught fish a growth path, and the official description advertises evolving fish into bigger and rarer sea monsters. If the pet you already own is the goal, return to that part of progression rather than endlessly replacing the task with another new capture.
For a missing species, use the index to choose the next catch. For the kept pet, use growth and evolution as the next aquarium question. The sea-monster capture guide focuses on preparing an accessible target and finishing the attempt. You can pursue a rare goal without combining collection, mutations and pet development into one assumed reward system.