Official Harpoon a Fish sea-monster artwork
Aquarium

Harpoon a Fish Aquarium: Fish Growth, Evolution and Upgrades

Give the fish you caught a reason to stay. The aquarium turns a landed catch into a pet to grow and develop. Choose placement for the first visit, growth or evolution for a kept fish, and the upgrade guide when space or spending has become the question you want to answer.

Choose the next taskOpen the answer matching the fish, pet or purchase decision in front of you.

Choose your question

Each destination adds the action or decision named in its preview.

Aquarium articles

Every guide in this collection, with its own next-reading task.

How to use these aquarium guides

Aquarium Guide connects the completed capture with placing and developing a pet. Grow Fish keeps that pet’s growth separate from the diver’s weight and the next reachable water. This distinction helps you stay with the object you actually want to develop instead of opening the wrong island menu.

Evolution follows the bigger-and-rarer kept-pet goal, while Aquarium Upgrades compares pet space, income and optional growth-time purchases. Choose the fish you intend to keep before committing a balance around it. A new collection target can be another fishing trip; the pet already placed can instead remain the focus of this session.

Harpoon a Fish tutorial and island menus

Follow the capture and island loop, then use a focused guide for the next task.

Continue a related task

Aquarium questions

What belongs in the aquarium first?

A completed catch you want to grow as a pet. Follow the placement interaction after returning from the water.

Is pet growth the same as diver weight?

They concern different objects. Weight progression serves deeper access; aquarium growth develops a kept fish.

Official Harpoon a Fish underwater artwork

Choose one useful next goal

Continue with the specific answer you need, or return to the first-session route when the whole loop is new.