Fisch · Fish
Basalt Behemoth
“A legendary, mountain-sized volcanic titan encased in plates of solid cooled basalt, dormant for centuries at the bottom of the world.”— in-game Bestiary description

Fish stats
Avg. sell value
C$2,028
C$ / kg
0.922
Weight range
1,200 kg – 3,200 kg
avg 2,200 kg
Base XP
8,200
By average value, Basalt Behemoth ranks #32 of 85 Legendary fish with a listed price.
Where and when to catch Basalt Behemoth
- Location
- Obsidian Trench
- Preferred bait
- Magnet
- Time of day
- Night
- Weather
- Rain
- Season
- Summer, Autumn, Winter, Spring
Basalt Behemoth guide
Between 1,200 and 3,200 kg, with a 2,200 kg average, Basalt Behemoth is among the heaviest fish documented: its maximum weight ranks 144th of 1,059. Because the weight is so large, the price per kilogram is just C$0.922, yet the average sale value still lands at C$2,028, ranking 363rd of 1,038 fish. Base XP is a hefty 8,200.
This Legendary belongs to Obsidian Trench, a zone with 11 documented fish, shared with two other Legendary entries, Magma-Glass Marlin and Shatter-Tooth Shark. The wiki lists Magnet as the bait and Night and Rain as the conditions, and it gives all four seasons: Summer, Autumn, Winter and Spring. The game describes it as "A legendary, mountain-sized volcanic titan encased in plates of solid cooled basalt, dormant for centuries at the bottom of the world."
Verdict: the sheer mass explains the high weight rank, and the C$2,028 average sale value is the result of a very low price per kilogram, while its distinctive data points are the Magnet bait and the four seasons listed.
Average value × mutation multiplier
Basalt Behemoth value with mutations
| Mutation | Multiplier | Estimated value |
|---|---|---|
| Albino | ×1.2 | C$2,434 |
| Aether | ×15 | C$30,420 |
| Ascended | ×12 | C$24,336 |
| Darkheart | ×11.8 | C$23,930 |
| Hades' Curse | ×11.1 | C$22,511 |
| Golden Part | ×11 | C$22,308 |
| Hadal | ×11 | C$22,308 |
Estimate = the wiki's average value × the mutation's listed multiplier. The real price also depends on the weight you land. All mutations
More fish at Obsidian Trench
Data sourced from the Fisch Wiki (CC BY-SA) and processed automatically; not tested in the game; last synced 2026-10-25.









