Obsidian Trench

One fish defines the value table at Obsidian Trench: Skolopendra, the only Exotic entry, averages C$44,333. That is more than ten times the C$4,350 of Shatterjaw Shark, the location's only Mythical and the second-highest earner. Below them sit three Legendary fish: Magma-Glass Marlin at C$2,281, Basalt Behemoth at C$2,028 and Shatter-Tooth Shark at C$1,417.

The wiki documents 11 fish here, with this rarity split: 3 Legendary, 2 Rare, 2 Common, 1 Unusual, 1 Mythical, 1 Exotic and 1 Uncommon. Because the roster is small, most tiers hold only one or two fish, and the breakdown includes no Trash entry. No caption and no NPC inhabitants are listed, and the location is marked as accessible.

The remaining names are Ash-Cloud Angelfish, Cinder-Crust Gar, Obsidian Gaveltooth, Pumice Puffer, Scoria Scorpionfish and Tectonic Toadfish.

Obsidian Trench matters mostly for Skolopendra; everything else here tops out at C$4,350 on the wiki's averages, with the Legendary trio between C$1,417 and C$2,281.