Harpoon a Fish How to Grow Fish in Your Aquarium
How to Grow Fish in Your Aquarium
- Answer: Place the caught fish in the aquarium, where the official loop says to grow it as a pet.
- Use it: Pet growth is different from gaining character weight to sink deeper.
- Next step: A paid growth-time reduction is optional and should serve a pet you actually intend to develop.
Start with a fish you have caught and kept
Fish growth begins on the aquarium side of Harpoon a Fish. Complete the capture, return to the island and place the fish as a pet. The developer explicitly includes that placement-and-growth sequence in the introductory instructions. A fish still being reeled is an unfinished attempt, rather than the pet-development task you came back to do.
For the first aquarium visit, stay with the tutorial interaction and the catch you want to keep. You do not need a dramatic monster before learning the pet loop. A modest first pet gives you a concrete subject for the growth goal and a reason to return to the aquarium between fishing trips.
Keep the pet and diver displays separate
The diver gains weight to sink deeper; the aquarium pet grows after you place it. Those are different objects in the same game loop. A fish’s catch-card weight is another piece of information about the creature you landed, rather than a replacement for your character’s progression.
Use that distinction when deciding what to do next. If the aim is reaching new water, the table and character growth are relevant. If the aim is developing the catch already in the tank, stay with the aquarium. The weight guide explains the access side, while this page keeps attention on the pet you have chosen to grow.
| Object | Next question |
|---|---|
| Diver | Do I need weight progression for deeper water? |
| Caught fish | Do I want to place it as a pet? |
| Kept aquarium pet | Do I want growth or evolution next? |
Make a growth-time purchase for a real pet goal
The official -50% Grow Time pass says that fish growth time is cut in half. That gives the purchase a specific purpose: reducing the wait associated with pet growth. It is a separate paid effect, rather than a prerequisite for putting a fish in the aquarium.
I would consider the purchase only after choosing the pets I actually want to develop and a spending limit I am comfortable with. If you are still exploring the opening loop or frequently changing the collection goal, there is no need to rush a paid decision. Read the current sale price before treating an old guide’s figure as the offer available to you.
Choose between another catch and evolution
Growing a kept fish and looking for another species are both useful goals, but they take the session in different directions. The index helps choose the next collection target. The aquarium keeps attention on the pet already placed. You can decide which one matters now instead of replacing every development goal with a new catch.
The creator also advertises evolving fish into bigger and rarer sea monsters. Use the evolution guide when that is the next pet question. Keep the actual interaction and current requirements attached to the fish you are developing; a growth-time pass should not become an assumed recipe, cost reduction or guaranteed evolution result that its description never promised.