PoltergeistC$15.4MStableObsidian ×8.3
Obsidian: ×8.3, a standard mutation. The Appraiser can't roll it. On the best fish, Magician Narwhal, it sells for 5,270,500 C$ at average weight.
- Multiplier
- ×8.3
- Type
- Standard
- Appraisable
- No
- Rank in standard group
- #27 of 146
Most valuable fish with Obsidian
Value = the wiki's average sell price × 8.3, at average weight.
PoltergeistC$15.4M
Magician NarwhalC$5.27MStableObsidian ×8.3
Bloop FishC$4.43MStableObsidian ×8.3
AshclawC$2.66MStableObsidian ×8.3
Corrupted MegalodonC$2.08MStableObsidian ×8.3
Elder MossjawC$1.9MStableObsidian ×8.3
10 most valuable Obsidian fish
Price at each fish's average weight with ×8.3, and the same with Shiny or Sparkling (×1.85) on top. Fish where the wiki's own numbers disagree are left out.
| # | Fish | Avg weight | Obsidian | + Shiny |
|---|---|---|---|---|
| 1 | Magician NarwhalApex | 12,700 kg | 5,270,500 | 9,750,425 |
| 2 | Bloop FishApex | 160,000 kg | 4,426,224 | 8,188,515 |
| 3 | Corrupted MegalodonSpecial | 55,000 kg | 2,282,500 | 4,222,625 |
| 4 | Elder MossjawSecret | 1,000,000 kg | 1,900,700 | 3,516,295 |
| 5 | AshclawApex | 350,000 kg | 1,859,200 | 3,439,520 |
| 6 | Corrupted ScyllaSpecial | 500,000 kg | 1,780,350 | 3,293,648 |
| 7 | Corrupted FloppySpecial | 50 kg | 1,719,287 | 3,180,681 |
| 8 | Corrupted KrakenSpecial | 50,000 kg | 1,660,000 | 3,071,000 |
| 9 | Corrupted MosslurkerSpecial | 500,000 kg | 1,660,000 | 3,071,000 |
| 10 | CharybdisApex | 2,500,000 kg | 1,639,250 | 3,032,613 |
Mutations with a similar multiplier
- Floral · ×8.4 · Standard
- Popsicle · ×8.16 · Event · Fischfest
- Blessed · ×8.5 · Standard
- Distraught · ×8.5 · Standard
- Jack's Curse · ×8.5 · Event · FischFright 2025
- Serene · ×8.5 · Standard
Using the Obsidian mutation
A fish carries one mutation at a time and the multiplier applies after the weight price, then the game rounds up. The same ×8.3 is worth far more on a heavy, high price-per-kg fish than on a small one, so check your catch in the sell calculator before you sell. Compare it with every other multiplier on the mutation list.
Frequently asked questions
How much is the Obsidian mutation worth in Fisch?
Obsidian multiplies a fish's price by 8.3. On the fish that pays most at average weight, Magician Narwhal, that is 5,270,500 C$ (9,750,425 C$ with Shiny or Sparkling).
Can you get Obsidian from the Appraiser?
No. Fisch Wiki marks Obsidian as not appraisable, so you need the right rod, bait, weather or event instead.
Data from Fisch Wiki (fisch.fandom.com), licensed CC BY-SA 4.0. We reformatted it and added the calculations. Last synced Nov 11, 2026. In-game prices can change with each update, so treat the game as the final word.