Fishing in Survivor's Elegy depends on biomes.

Fish

Edible

Fish

The fallback fish item. Can be caught in any biome where none other fish species are found.

Cod

The vanilla cod, can be caught in the following biomes:

• Ocean (all variants)
• Lukewarm Ocean (all variants)
• Warm Ocean
• Beach
• Stony Shore
• Mushroom Fields

Catfish

Dark fish with tiny barbels. Can be caught in the following biomes:

• River
• Birch Forest (all variants)
• Dark Forest
• Desert
• Savanna (all variants)
• Badlands (all variants)
• Jungle (all variants)
• Pale Forest

Tuna

Can be caught in the following biomes:

• Ocean (all variants)
• Cold Ocean (all variants)
• Frozen Ocean (all variants)

Salmon

The vanilla fish. Can be caught in the following biomes:

• Cold Ocean (all variants)
• Frozen Ocean (all variants)
• Beach
• Stony Shore
• River (all variants)
• Forest
• Plains
• Taiga (all variants)
• Windswept Hills

Bass

Can be caught in the following biomes:

• Swamp (all variants)
• River
• Jungle (all variants)
• Dark Forest
• Pale Forest

Trout

Can be caught in the following biomes:

• River (all variants)
• Plains (all variants)
• Peaks (all variants)
• Meadow
• Grove
• Snowy Slopes
• Windswept Hills (all variants)
• Forest
• Taiga (all variants)
• Ice Spikes
• Lush Caves

Turbot

Flat beige fish. Can be caught in the following biomes:

• Shallow Oceans and Cold Oceans
• Beach (all variants)
• Stony Shore
• Dripstone Caves
• Deep Dark

Silver Hake

Can be caught in the following biomes:

• Ocean and Cold Oceans
• Stony Shore
• Mushroom Fields

Non edible

Tropical Fish

The vanilla Tropical fish. Can be caught in the following biomes:

• Lukewarm and Warm Oceans
• Lush Caves

Koi Carp

White and red fish. Can be caught in the following biomes:

• Flower Forest
• Cherry Grove
• Lush Caves

Pufferfish (both species)

Consists of two species, the porcupine fish (vanilla pufferfish) and the pufferfish, a brown balloon-like fish. Can be caught in the following biomes:

• Lukewarm and Warm Oceans