Petrified is one of the stone-themed mutations added to Fisch in Version 2.0, and it multiplies a fish’s sell value by 8×. That puts it in the same bracket as Alien, Atomic, Galaxy, and Glacial, which makes it a genuinely useful money mutation rather than a cosmetic curiosity. There are three ways to put it on a fish, and only one of them is reliable.
Quick answer: Equip the Ancient Idol Rod and fish anywhere — its Idol’s Judgement passive applies Petrified to your catch. If you don’t own the rod, fish in Skycrest for a 0.065% natural roll, or pay an Appraiser to reroll an unmutated fish at roughly the same 0.065% base chance.
Petrified value multiplier and obtainment chances
The multiplier applies to the fish’s base sell price, so the mutation is worth chasing on high-value species and heavy specimens rather than on whatever bites first. A fish can only carry one mutation at a time, but attributes such as Shiny, Sparkling, Big, and Giant stack on top of it — a Shiny Big Petrified catch is a real combination and sells for considerably more than a plain one.
| Detail | Value |
|---|---|
| Sell multiplier | 8× |
| Appraisable | Yes (~0.065% base chance) |
| Natural catch | 0.065% in Skycrest |
| Rod source | Ancient Idol Rod |
| Added in | Version 2.0 |
Note: mutation priority matters when several sources overlap. If your total mutation chance on a cast exceeds 100%, the game trims the mutations with the lowest multiplier or lowest priority first, and a mutation worth more than 8× will take the slot instead of Petrified.
Method 1: Use the Ancient Idol Rod
This is the fastest route and the one worth building around. The Ancient Idol Rod carries the Petrified mutation on its own passive, so you are not relying on a fraction-of-a-percent roll.
There is also a third, less consistent option tied to the same theme: praying at the moss statue can hand you a Petrified fish. Treat it as a bonus rather than a farming plan.
Method 2: Fish naturally in Skycrest
Petrified rolls naturally, but only in Skycrest, and only at 0.065%. That is roughly one in every 1,500 catches with no boosts, so it is a background bonus you pick up while grinding the region rather than something you can target.
Because the odds are per catch, anything that increases how quickly you cast and land fish increases how often you see it. Faster rods, denser fishing spots, and bait that shortens the wait between bites all help. Nothing about the mutation is tied to weather, time of day, or an event, so there is no window you need to wait for.
Method 3: Reroll Petrified at an Appraiser
Petrified is an appraisable mutation, which means an Appraiser NPC can apply it to a fish you already own. The base chance is about 0.065% per appraisal, and the Appraiser’s Luck gamepass raises that rate. Appraising costs C$ each time, so bring a fish that is already worth the investment.
Shiny and Sparkling are safe during appraisal and cannot be lost. Size attributes such as Tiny, Small, Big, and Giant can disappear if the reroll shifts the fish’s weight back toward its normal range.
How to confirm a Petrified catch, and why it fails
You know it worked when “Petrified” appears in front of the fish’s name in your inventory and catch popup, written in a muted stone gray. The sell price shown at a merchant is the second check — it should be eight times what the same fish without a mutation fetches.
When it doesn’t trigger, the reason is usually one of three things. You are fishing naturally outside Skycrest, where the mutation cannot roll at all. You are stacking rods, enchantments, or event effects whose combined mutation chance pushes past 100%, so a higher-multiplier mutation takes the single available slot. Or the fish you handed the Appraiser already had a mutation, and the reroll swapped it rather than adding Petrified on top.
If your goal is income rather than a Bestiary entry, the Ancient Idol Rod is the only approach that turns Petrified into a repeatable payday. Skycrest and the Appraiser are there for players who don’t have the rod yet, and both are slow enough that you should treat any 8× fish they produce as a lucky bonus on top of a normal fishing session.
