The Reinforced Crab Cage is a stronger version of the standard crab cage in Fisch. It catches up to four fish at a time, making it significantly more productive than the basic crab cages sold at most islands. If you need it for the Boreal Pines bestiary or for use in areas like Toxic Grove, here's exactly where to find it and how it works.
Quick answer: Travel to Boreal Pines and purchase the Reinforced Crab Cage from the local vendor for 1,000 Cash.

Reinforced Crab Cage location and price
The Reinforced Crab Cage is exclusively sold at Boreal Pines. Unlike standard crab cages, which are available at nearly every island (Moosewood, for example), the reinforced variant is only stocked by the Boreal Pines vendor. The price is 1,000 Cash per cage. You can buy multiple cages in a single visit — just click on the item in the vendor's shop and purchase as many as you need.

How to place and use the Reinforced Crab Cage
Step 1: Equip the Reinforced Crab Cage from your inventory. Walk to the edge of any body of water and hold the cage in your hand.
Step 2: Watch for the placement indicator on the ground. When it turns green, you're in a valid spot and can place the cage down. If it stays red, move to a different location — another player's cage may already be occupying that area.
Step 3: Wait for the cage to catch something. You'll know it's ready when you hear a clicking sound or see particles rising from the cage. Walk up to it and collect your catch.

Reinforced Crab Cage vs. standard crab cages
| Feature | Standard Crab Cage | Reinforced Crab Cage |
|---|---|---|
| Capacity | Fewer fish per catch | Up to 4 fish at a time |
| Sold at | Most islands (e.g., Moosewood) | Boreal Pines only |
| Price | Cheaper | 1,000 Cash |
| Works in Toxic Grove | No | Yes |
The higher capacity and compatibility with tougher zones like Toxic Grove make the Reinforced Crab Cage a worthwhile upgrade once you can afford it. The cage from the Sunken Reliquary also works in Toxic Grove, but the Boreal Pines version remains the most commonly used option.
Where the Reinforced Crab Cage is required
Certain areas in Fisch demand the Reinforced Crab Cage or an equivalent upgraded cage. Toxic Grove is one such zone — placing a standard crab cage there won't work. If you're trying to complete the Boreal Pines bestiary, you'll also need this cage to catch specific fish that only appear in reinforced traps. The cage is additionally useful for catching Anchors at Tidefall, where it outperforms the basic version.

Picking up a few Reinforced Crab Cages before heading into Boreal Pines or Toxic Grove saves you from having to backtrack later. At 1,000 Cash each, stocking up on several at once is the most efficient approach — just remember to collect them before they vanish.