Net A Fish Fusion Guide: Recipes and Fuse All

Each recipe produces one fish of the next mutation tier. All inputs must belong to the same target species and match the required input tier; unrelated species do not contribute to that stack.

The last column assumes you start with no higher-tier stock and make every intermediate fish through normal fusion. For one Starlit, the calculation is 10 × 8 × 6 × 4 × 3 × 2 = 11,520 ordinary fish of the same species.

Already have naturally caught or previously fused variants? Count them at their own tier. Two eligible Rainbow fish satisfy the Starlit recipe directly—you do not need another 11,520 catches.

Fusion improves a fish's mutation variant, which is separate from its species and rarity. For mutation effects and other ways to obtain variants, see the mutations guide.

1. Open Fish Cooler. Select the side Cooler button, or approach the cooler at your dock and press E.
2. Find your target fish's stack. Read its fusion progress. When the material requirement is met, the card offers Fuse.
3. Choose your scope. Select Fuse for that stack, or Fuse All to process all eligible groups.
4. Confirm bulk fusion. After selecting Fuse All, choose Confirm. It continues through further tiers whenever enough materials remain.
5. Read the result notification and updated stacks. The results tell you how many fusions completed and which variants you received.

Use single-stack Fuse when you want to upgrade a particular fish. Choose Fuse All when you want every eligible group processed, including further promotions made possible by those results.

For example, a batch with one eligible ordinary Creek Chub group and one eligible ordinary River Minnow group produces one Shiny Creek Chub and one Shiny River Minnow. With starting Shiny counts of one and two, those stacks become two and three. That is two completed fusions, not two promotions for each species.

Fused variants can improve showcase income. When choosing what to display afterward, compare the actual fish's income or placement preview; the showcase income guide covers that choice.

Read the current tier's shortage

A progress counter measures fish at that stack's current input tier. Shiny Bone Pike at 5/8 needs three more eligible Shiny Bone Pike to make one Gold Bone Pike. Three ordinary Bone Pike do not fill that gap.

Calculate the shortage as required count − eligible stack count, with a minimum of zero. Keep both counts in the same species and input tier.

Stop selling the fish you need

Auto-Sell can remove duplicates as you catch them. In Cooler → Auto-Sell, keep your target ordinary fish outside the selected selling range, or choose NOTHING while gathering materials. Turn on Keep Mutated Fish to retain mutated catches within the selling range; that switch does not protect ordinary duplicates.

New species and fish at your current net's highest catchable rarity always enter the Cooler. Automatically sold catches still count toward catch totals, so a rising catch counter does not necessarily mean your fusion stack is growing. See the Cooler and Auto-Sell guide for the full inventory controls.

Build duplicate stock

• Invest in Fisherman for fish you already own. It collects duplicates of previously collected species, and its cash upgrades improve collection efficiency. This makes it useful for steadily building fusion stock. See Fisherman upgrades and fusion farming.
• Use Double Haul to add catches. When its effect triggers, it supplies an extra fish of the same species without taking additional net capacity. It helps accumulate duplicates but does not guarantee your target species on each catch. See Fishing upgrade priorities.

Fusion itself does not increase species mastery. Qualifying catches advance mastery; turning existing fish into a higher variant does not add another qualifying catch.

Auto Fuse

Unlock Auto Fuse through Game Passes. The Cooler automatically fuses stacks as soon as they meet their requirements, then continues up the ladder through any further eligible tiers. The pass costs 199 Robux, with a 160 Robux Plus shop price.

Choose it for convenience when duplicates are accumulating regularly. If your main problem is insufficient materials, Auto Fuse still needs you to build those stacks. For other paid benefits, see the Game Passes guide.

Instant Fuse

Instant Fuse is a separate paid action used from the Cooler:

1. Select the fusion progress on a stack that lacks materials.
2. Read the target recipe. For Paddlefish at 1/10, the prompt calls for 10 Paddlefish to make Shiny Paddlefish.
3. Select it again to open the Instant Fuse purchase window.

For that Paddlefish offer, the purchase window lists 29 Robux, or 24 Robux with Plus, a saving of 5 Robux. Treat those prices as the Paddlefish offer's purchase conditions rather than a price for every possible fusion.

Choose Instant Fuse when you want that immediate paid action. Keep collecting duplicates and use normal fusion when you prefer to meet the recipe through catches.