You get the Noxious mutation in Fisch by fishing with the craftable Toxinburst Rod — it applies Noxious to 35% of standard catches and guarantees it on extra fish from its fungus ability. It tanks a fish’s sell value to 0.3×, but you need it: the Plagued Reaper requires a Noxious Rotbloom to hand over the Plaguereaver Rod, a top endgame rod. I’ve ground out the whole chain, so below you’ll find every quest, material, and step, plus my shortcuts for stacking Noxious fish fast in 2026.
| Quick Facts | Details |
|---|---|
| Sell value | 0.3× (reduced) |
| Appearance | Purple obsidian texture with bubble particles |
| Source | Toxinburst Rod only — 35% per catch, 100% on fungus fish |
| Appraisable | No |
| Why you need it | Noxious Rotbloom → Plaguereaver Rod unlock |
| Rod cost | 185,000 C$ + 4 materials (Level 325) |
What Does the Noxious Mutation Do in Fisch?
Noxious multiplies a fish’s sell value by 0.3× — one of the few mutations that hurts your wallet, while its sibling Toxic pays a 6× bonus. The fish takes on a dark purple obsidian texture with floating bubble particles, easy to spot in your inventory. Unlike Albino or Darkened, it can’t spawn naturally, and the Appraiser can’t grant or remove it. It’s purely a progression gate, so keep any Noxious fish — ideally a Rotbloom — for the Plagued Reaper’s questline in Toxic Grove.
| Mutation | Sell Value | How You Get It |
|---|---|---|
| Noxious | 0.3× | Toxinburst Rod (35% per catch) or fungus passive (100%) |
| Toxic | 6× | Toxinburst Rod (15% chance per catch) |
How to Craft the Toxinburst Rod in Fisch?
Unlike the Webweaver Rod or Doomsekkar Rod, you can’t buy the Toxinburst — you earn it. Here’s the route I followed:
- Reach Level 325. The crafting recipe stays locked until then.
- Unlock Toxic Grove. Find Olivia and complete her quest (catch a Venom Maw or Mycotide Serpent) to earn the Toxic-Proof Raft.
- Collect the four materials using the table below.
- Craft the rod at the anvil inside the Ancient Archives for 185,000 C$.
| Material | How to Get It |
|---|---|
| Toxinburst Handle | Elijah’s Twisted Collection: catch a Toxic Jellymass, Mire Krakenling, and Planterech with the Toxic Spire Rod |
| Toxinburst Line | Plagued Reaper Stage 1: catch a Decayed-mutated Venom Maw during a Toxic Boil using the Decayed Rod with Shark Head bait |
| Toxinburst Shaft | Felix’s Blight Specimen: catch a Giant Blight Pufferfish with Reinforced Crab Cages, appraising for the Giant variant |
| Toxic Jellymass | Place Reinforced Crab Cages in Toxic Grove waters (also fishable directly) |
Toxinburst Rod Stats and Abilities
| Stat | Value |
|---|---|
| Lure Speed | 83% |
| Luck | 85% |
| Control | -0.02 |
| Resilience | 30% |
| Max Kg | 125,000 kg |
| Level / Cost | Level 325 / 185,000 C$ |
The passives are where this rod earns its price. Poison bursts fire every 1–2 seconds and add 4% progress, while a fungus spawns every 20–40 seconds with a 20% chance to explode and gift 2–3 always-Noxious fish. Each catch stacks Propagation for one minute; every tier adds 25% fungus spawn rate and 2.5% burst rate, capping at 1,250% and 125%. A Hunt Focus: Rotbloom (+2) bonus even pushes the fish you need for the Plaguereaver questline, and the rod works in lava and Noxious Fluid pools.
Pro Tips for Farming Noxious Fish Fast
From my runs and the r/FischRoblox community:
- Keep catching to stack Propagation — tiers only climb while you land fish, so chained catches snowball Noxious output.
- Skip the Rotbloom’s exact spot — anywhere in Toxic Grove works; Hunt Focus handles spawning.
- Run the Long enchant with Shells of Endurance for control, or bring a fed Seal companion if the minigame fights back.
- Don’t farm money with it. At 0.3× value it’s a progression tool — for profit, the free Boglin Branch Rod’s 6× mutation is far better.
Frequently Asked Questions
What does the Noxious mutation do in Fisch?
It multiplies a fish’s sell value by 0.3× and gives it a purple obsidian look with bubbles. It’s required for the Plaguereaver Rod questline, not for profit.
Can you get Noxious fish without the Toxinburst Rod?
No. It can’t spawn naturally and the Appraiser can’t apply it — the Toxinburst Rod’s 35% chance and 100% fungus passive are the only sources.
What are the odds of getting Noxious in Fisch?
Standard catches roll Noxious 35% of the time (15% roll Toxic instead), while fungus-spawned extra fish are guaranteed Noxious.
Is the Noxious mutation worth getting?
For money, no. For progression, absolutely — a Noxious Rotbloom unlocks one of the strongest endgame rods, so the 185,000 C$ pays off.
How do I get a Noxious Rotbloom quickly?
Fish anywhere in Toxic Grove with the Toxinburst Rod, run Shells of Endurance, and keep Propagation alive for constant fungus explosions.
Related Reading
Related Articles
