In Trails of Cold Steel IV, there is a trophy called Angler God, Master of the Aqueous Realm. In order to earn this trophy, you will need to completely fill out the fishing section in the notebook (all 30 types of fish + rod level max). To open the notebook and check your progress, simply press the touch button.
Azelfish
- East Crossbell Highway 2
Blue Marlin
- Byronia Island (on beach)
Cangiru
- Old Agria Road (at a pond in the southern part of the map)
- Parm Byroad 1 (near Parm map transition)
Carp
- Parm (on a bridge between Jerome’s General Store and Vander Training Hall)
- Parm Byroad 2 (near a bridge south of the Parm Byroad 1 map transition)
Cobalt Crab
- Ursula Road 1
- Mishelam (Wharf)
Cobrahead
- Old Lamare Road 1
Elecantus
- Byronia Island (by waterfall)
Estrella
- Lake Gala Byroad (obtain fishing spot from Kopan at White Birch Inn in Milsante)
Flamear Ojo
- St. Ursula Medical College (obtain fishing spot from Kenneth in Le Lectier Inn on 8/30)
Forest Gill
- Ursula Road 3
- Lake Elm Wetlands 2
Glutton Shark
- Auros Coastal Road 1
- Auros Coastal Road 2
Gold Salmon
- North Sutherland Highway 2
Grand Lakelord
- Mishelam – After you’ve caught 29 of the 30 fish, travel to Lakeside Beach for a special event where you will catch the 30 fish.
Kasagin
- Eryn (near Monument)
Marble Snakehead
- Avon Hills (during A Herculean Task quest)
Noble Carp
- East Crossbell Highway 3
Northern Arowana
- Lake Gala Byroad (after barrier is removed)
Pearlglass
- Lake Elm Wetlands 1
Pink Azelfish
- Ordis (Harbor District)
Puffer
- Crossbell (Harbor District)
- Ursula Road 2
Quicksilver Carp
- Leeves
Rainbow Trout
- North Languedoc Canyon Road 2
Red Perch
- South Sutherland Highway 1 (along the river in the northeastern side of the map)
- South Sutherland Highway 2 (near the central western part of the area)
Rockeater
- Eerie Woods – North
Sky Gill
- Lake Gala Byroad
Snow Crab
- Isthmia Great Forest (near map transition to West Sutherland Highway)
- Parm Byroad 1 (near Parm map transition)
Snow White
- Byronia Island (On 8/20 speak with Annabelle in the lodge on Byronia Island to get the new fishing spot behind the waterfall)
Spiky Puffer
- Byronia Island (on dock)
Tiger Arowan
- Hamel Road 1
- Hamel Road 2
Zafiro Espada
- Auros Coastal Road 2