Bottom fish
Conger, pollack, ling, cod: they live hard against the ground, in rock, wrecks and deep water. You fish for them vertically, and the ground decides everything.
15 species documented
These species do not roam open water: they hold within a small radius of shelter and hunt short distances from it. Fishing therefore means putting a bait inside that radius, usually straight down beneath the boat, with a lead heavy enough to hold against the tide.
Relief does all the sorting. A wreck, a ledge, a rocky plateau or a jumble of boulders each holds its own population, and two marks fifty metres apart will not give the same fish. The sounder here is less for spotting fish than for understanding the structure they live on.
It is demanding fishing for tackle. Chafe on rock, snags and hauling powerful fish up from depth call for strong line, checked often, and a rig built to break where you chose rather than wherever it happens.

Atlantic cod
Gadus morhua
Bottom fish· 200 cm

Atlantic wolffish
Anarhichas lupus
Bottom fish· 150 cm

Black rockfish
Sebastes melanops
Bottom fish· 63 cm

Burbot
Lota lota
Bottom fish· 152 cm

European hake
Merluccius merluccius
Bottom fish· 140 cm

Freshwater drum
Aplodinotus grunniens
Bottom fish· 95 cm

Haddock
Melanogrammus aeglefinus
Bottom fish· 112 cm

Ling
Molva molva
Bottom fish· 200 cm

Pacific cod
Gadus macrocephalus
Bottom fish· 119 cm

Pollack
Pollachius pollachius
Bottom fish· 130 cm

Poor cod
Trisopterus minutus
Bottom fish· 40 cm

Pouting
Trisopterus luscus
Bottom fish· 46 cm

Saithe
Pollachius virens
Bottom fish· 130 cm

White sucker
Catostomus commersonii
Bottom fish· 65 cm

Whiting
Merlangius merlangus
Bottom fish· 91.5 cm