In Fisch, storing fish, displaying them in your Personal Aquarium, and protecting them from a bulk sale are separate actions. Community changelog notes confirm an Aquarium Storage System, while a community guide describes placing fish in Aquarium slots. If you only want to keep a catch out of an ordinary inventory sale, favorite it or check the relevant auto-sell setting.
Choose the right way to keep a fish
| Goal | Use | What is established |
|---|---|---|
| Organize fish outside your ordinary inventory | Aquarium Storage System | A Fisch changelog excerpt says the system was added to store and organize items and caught fish. It does not establish current capacity or exact transfer controls. Source: Fisch changelog |
| Put a fish on display and use the Aquarium feature | Personal Aquarium | A community guide describes slot-based placement and reports that the feature unlocks at level 25. It also says the Aquarium can provide XP, C$, and items. Source: Fisch Wiki Aquarium guide |
| Keep a fish from an ordinary whole-inventory sale | Favorite status or auto-sell settings | A Merchant guide says to favorite fish you want to keep or disable auto-sell for the relevant rarity before selling the inventory. This protects against that sale flow; it does not move fish into storage. Source: Fisch Wiki Merchant guide |
Move fish into Aquarium Storage
Community changelog text confirms that Aquarium Storage exists for caught fish and other items, but the available description does not give a dependable current sequence of buttons, a capacity limit, or a favorite-protection rule for selling stored fish.
- Open the Aquarium or storage interface in the live game.
- Look for Aquarium Storage System and follow the on-screen prompts to move the fish from your inventory into storage.
- Check the destination before leaving the interface so you know the fish is no longer in your ordinary inventory.
These are practical orientation steps, not a verified button-by-button walkthrough: the current UI labels and transfer sequence are not established in the cited changelog. A separate changelog excerpt reports that Merchants support bulk selling fish from Personal Aquarium Storage, so storage should not be treated as automatic protection from selling. Fisch changelog
Place a fish in your Personal Aquarium
The Personal Aquarium is a slot-based feature, not simply another name for Aquarium Storage. A community guide says access begins at level 25 and describes this interaction:
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- Open the Aquariums tab, which the guide places at the top-right beside Menu.
- Hold the fish you want to place.
- Select an empty Aquarium slot.
- To remove a displayed fish, select its X control.
The same guide describes the Personal Aquarium as a display and a source of XP, C$, and items. Its placement and controls may have changed since the guide was updated, so use the live game’s prompts if the labels differ. Fisch Wiki Aquarium guide
Keep fish safe when selling
For an ordinary whole-inventory sale through a Merchant, the Merchant guide recommends favoriting fish you want to keep or turning off auto-sell for the relevant rarity before choosing the bulk-sale option. This is inventory-sale protection, not evidence that a fish has been transferred to Aquarium Storage. Fisch Wiki Merchant guide
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Stored fish have a separate reported sale flow: changelog text says Merchants can bulk sell fish held in Personal Aquarium Storage. The available descriptions do not verify whether favorites protect fish in that flow in the same way they protect inventory fish. Check the items shown by the current sale interface before confirming.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the sources establish—and what can change
The mechanics above come from community-maintained Fisch pages and changelog excerpts, not official developer documentation. The Fisch Wiki pages are dated September 25, 2026; a related third-party video guide was published June 12, 2026. Game interfaces and mechanics can change, and those sources do not establish current storage capacity, a complete transfer walkthrough, or identical favorite behavior across sale flows.
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