The Obsidian Trench Bestiary Guide details the Bait, Weather, season, and timing requirements for all 12 fish fishable at the location. You must complete the Bestiary to purchase the Chasm-Stalker Rod available at the same POI.
The Obsidian Trench is a secret location inside the Mariana's Veil that players can access after collecting the five Gauntlets and performing the Awakening Ritual. Like other secret locations, the Obsidian Trench is home to several rare, unique-looking fish, each with its own bait, weather, timing & season requirements. So, if you are looking to complete the Obsidian Trench Bestiary and are stuck, here is a guide to follow.
How to reach Obsidian Trench in Fisch
As mentioned earlier, the Obsidian Trench is a secret location inside the Mariana's Veil that you can access after performing the Awakening Ritual. First, you must obtain all 5 Gauntlets by satisfying the Ignis, Glacius, Tenebris, Luminis & Resonus NPCs on each Mariana's Veil layer. Then, catch the fish according to your Unique riddle and stand with it at Obsidian Pocket to open the underground door that will take you to the Obsidian Trench.
How to catch all 12 fish in Obsidian Trench
The table below details how to catch all 12 fish in the Obsidian Trench. It includes preferred bait, timing, and season & weather requirements you can follow to reel in the fish easily.
| Fish Name (Rarity) | Bait | Weather | Time | Season |
|---|---|---|---|---|
| Pumice Puffer (Common) | Shrimp | Clear | Day | Summer |
| Scoria Scorpionfish (Common) | Shrimp | Clear | Day | Autumn |
| Ash-cloud Angelfish (Uncommon) | Seaweed | Clear | Day | Autumn |
| Obsidian Gaveltooth (Unusual) | Fish Head | Clear | Night | Summer, Autumn |
| Cinder-Crust Gar (Rare) | Minnow | Rain | Day | Summer |
| Tectonic Toadfish (Rare) | Worm | Foggy | Night | Autumn, Winter |
| Basalt Behemoth (Legendary) | Magnet | Rain | Night | Summer, Autumn, Winter, Spring |
| Magma-Glass Marlin (Legendary) | Squid | Clear | Day | Summer |
| Shatter-Tooth Shark (Legendary) | Fish Head | Foggy | Night | Summer |
| Shatterjaw Shark (Mythical) | Fish Head | Rain | Night | Summer, Winter |
| Skolopendra (Exotic) | Kraken Tentacle | Rain, Foggy | - | Autumn, Winter |
| Veiled Charybdis (Apex) | Meteor, Sea Beetle | - | Night | - |
Why should you complete the Obsidian Trench Bestiary?
The main reason to finish the Obsidian Trench Bestiary is to purchase the Chasm-Stalker Rod. Yes, aside from the hefty C$5,000,000 price tag, you must complete the entire Obsidian Trench Bestiary to be eligible to buy it.
For more on Fisch, check out All 7 Fish in Nectar Den (100% Bestiary) Fisch or All 21 Fish in the Outer Deep (100% Bestiary) – Fisch
