This is a list of fish found in and around Great Britain, in both fresh water (lakes, rivers, streams and man-made pools) and salt water. This list includes species that are native to Great Britain, as well as those which have been introduced from other countries.
- Arctic skate, Amblyraja hyperborea
- Thorny skate, Amblyraja radiata
- Spinetail ray, Bathyraja spinicauda
- Common skate, Dipturus batis
- Norwegian skate, Dipturus nidarosiensis
- Long-nosed skate, Dipturus oxyrinchus
- Sandy ray, Leucoraja circularis
- Shagreen ray, Leucoraja fullonica
- Cuckoo ray, Leucoraja naevus
- Blue ray, Neoraja caerulea
- Blonde ray, Raja brachyura
- Thornback ray, Raja clavata
- Smalleyed ray, Raja microocellata
- Spotted ray, Raja montagui
- Undulate ray/painted ray, Raja undulata
- Deepwater ray, Rajella bathyphila
- Bigelow's ray, Rajella bigelowi
- Sailray, Rajella lintea
- Round ray, Rajella fyllae
- Bottlenose skate, Rostroraja alba
- Common bream/bronze bream/skimmer bream, Abramis brama
- Bleak, Alburnus alburnus
- Asp, Aspius aspius (introduced)
- Barbel, Barbus barbus
- Silver bream, Blicca bjoerkna
- Goldfish, Carassius auratus (introduced)
- Crucian carp, Carassius carassius / Carassius cuvieri
- Grass carp, Ctenopharygodon idella (introduced)
- Common carp/mirror carp/leather carp/koi, Cyprinus carpio (introduced)
- Gudgeon, Gobio gobio
- Silver carp, Hypophthalmichthys molitrix (introduced)
- Bighead carp, Hypophthalmichthys nobilis (introduced)
- Sunbleak, Leucaspius delineatus (introduced)
- Chub, Squalius cephalus
- Orfe, Leuciscus idus (introduced)
- Common dace, Leuciscus leuciscus
- Eurasian minnow, Phoxinus phoxinus
- Fathead minnow, Pimephales promelas (introduced)
- Topmouth gudgeon, Pseudorasbora parva (introduced)
- European bitterling, Rhodeus amarus (introduced)
- Amur bitterling, Rhodeus sericeus (introduced)
- Roach, Rutilus rutilus
- Common rudd, Scardinius erythrophthalmus
- Tench, Tinca tinca
- Baird's slickhead, Alepocephalus bairdii
- Risso's smooth-head, Alepocephalus rostratus
- Longfin smooth-head, Conocara macropterum
- Elongate smooth-head, Conocara microlepis
- Murray's smooth-head, Conocara murrayi
- Salmon smooth-head, Conocara salmoneum
- Blackhead salmon, Narcetes stomias
- Abyssal smooth-head, Rinoctes nasutus
- Softskin smooth-head, Rouleina attrita
- Madeiran smooth-head, Rouleina maderensis
- Bluntsnout smooth-head, Xenodermichthys copei
- European cisco, Coregonus albula
- Arctic cisco, Coregonus autumnalis
- Lake whitefish, Coregonus clupeaformis (introduced)
- Powan, Coregonus clupeioides
- European whitefish, Coregonus lavaretus
- Houting, Coregonus oxyrinchus (extinct in Britain)
- Gwyniad, Coregonus pennantii
- Pollan, Coregonus pollan
- Schelly, Coregonus stigmaticus
- Vendace, Coregonus vandesius
- Huchen, Hucho hucho (introduced)
- Pink salmon, Oncorhynchus gorbuscha (introduced)
- Silverbrite salmon, Oncorhynchus keta (introduced)
- Coho salmon, Oncorhynchus kisutch (introduced)
- Cherry salmon (yamame-trout), Oncorhynchus masou (introduced)
- Rainbow trout, Oncorhynchus mykiss (introduced)
- Chinook salmon, Oncorhynchus tshawytscha (introduced)
- Ferox trout, Salmo ferox
- Sonaghan, Salmo nigripinnis
- Atlantic salmon, Salmo salar
- Gillaroo, Salmo stomachicus
- Brown trout/sea trout/Dollaghan, Salmo trutta
- Arctic charr, Salvelinus alpinus
- Brook trout, Salvelinus fontinalis (introduced)
- Shetland charr, Salvelinus gracillimus
- Loch Melvin charr, Salvelinus grayi
- Orkney charr, Salvelinus inframundus
- Haddy charr, Salvelinus killinensis
- Haweswater charr, Salvelinus lonsdalii
- Loch Shin charr, Salvelinus mallochi
- North Minch charr, Salvelinus maxillaris
- Lake trout, Salvelinus namaycush (introduced)
- Lough Leane charr, Salvelinus obtusus
- Llyn Peris charr, Salvelinus perisii
- Rannoch charr, Salvelinus struanensis
- Windermere charr, Salvelinus willughbii
- Golden charr, Salvelinus youngeri
- Grayling, Thymallus thymallus
- Glacier lanternfish, Benthosema glaciale
- Spothead lantern fish, Diaphus metopoclampus
- White-spotted lantern fish, Diaphus rafinesquii
- Chubby flashlightfish, Electrona risso
- Jewel lanternfish, Lampanyctus crocodilus
- Diamondcheek lanternfish, Lampanyctus intricarius
- Rakery beaconlamp, Lampanyctus macdonaldi
- Pygmy lanternfish, Lampanyctus pusillus
- Cocco's lantern fish, Lobianchia gemellarii
- Spotted lanternfish, Myctophum punctatum
- Topside lampfish, Notolychnus valdiviae
- Lancet fish, Notoscopelus kroyeri
- Arctic telescope, Protomyctophum arcticum
- Large scale lantern fish, Symbolophorus veranyi
- Cusk, Brosme brosme
- Fivebeard rockling, Ciliata mustela
- Northern rockling, Ciliata septentrionalis
- Four-bearded rockling, Enchelyopus cimbrius
- Arctic rockling, Gaidropsarus argentatus
- Bigeye rockling, Gaidropsarus macrophthalmus
- Shore rockling, Gaidropsarus mediterraneus
- Three-bearded rockling, Gaidropsarus vulgaris
- Burbot, Lota lota
- Blue ling, Molva dypterygia
- Common ling, Molva molva
- Spanish ling, Molva macrophthalma
- Silvery pout, Gadiculus argenteus
- Thor's pout, Gadiculus thori
- Atlantic cod, Gadus morhua
- Greenland cod, Gadus ogac
- Haddock, Melanogrammus aeglefinus
- Whiting, Merlangius merlangus
- Blue whiting, Micromesistius poutassou
- Pollock, Pollachius pollachus
- Saithe, Pollachius virens
- Tadpole fish, Raniceps raninus
- Norway pout, Trisopterus esmarcki
- Pouting, Trisopterus luscus
- Poor cod, Trisopterus minutus
- Hollowsnout grenadier, Coelorinchus caelorhincus
- Spearsnouted grenadier, Coelorinchus labiatus
- Abyssal grenadier, Coryphaenoides armatus
- Short-bearded grenadier, Coryphaenoides brevibarbis
- Carapine grenadier, Coryphaenoides carapinus
- Günther's grenadier, Coryphaenoides guentheri
- Ghostly grenadier, Coryphaenoides leptolepis
- Mediterranean grenadier, Coryphaenoides mediterraneus
- Deepwater grenadier, Coryphaenoides profundicolus
- Rock grenadier, Coryphaenoides rupestris
- Glasshead grenadier, Hymenocephalus italicus
- Onion-eye grenadier, Macrourus berglax
- Softhead grenadier, Malacocephalus laevis
- Common Atlantic grenadier, Nezumia aequalis
- Whiptail grenadier, Pseudonezumia flagellicauda
- Roughnose grenadier, Trachyrincus murrayi
- Roughsnout grenadier, Trachyrincus scabrus
- Guppy, Poecilia reticulata (introduced)
- Pogge, Agonus cataphractus
- Luvar, Luvarus imperialis
- Bogue, Boops boops
- Common dentex, Dentex dentex
- Pink dentex, Dentex gibbosus
- Morocco dentex, Dentex maroccanus
- White seabream, Diplodus sargus
- Saddled seabream, Oblada melanura
- Spanish bream, Pagellus acarne
- Blackspot seabream, Pagellus bogaraveo
- Pandora bream, Pagellus erythrinus
- Pagre, Pagrus auriga
- Blue-spotted bream, Pagrus caeruleostictus
- Red porgy, Pagrus pagrus
- Salema porgy, Sarpa salpa
- Gilt-head bream, Sparus aurata
- Black sea bream, Spondyliosoma cantharus
- Transparent goby, Aphia minuta
- Jeffrey's goby, Buenia jeffreysii
- Crystal goby, Crystallogobius linearis
- Giant goby, Gobius cobitis
- Couch's goby, Gobius couchi
- Red-mouthed goby, Gobius cruentatus
- Steven's goby, Gobius gasteveni
- Black goby, Gobius niger
- Rock goby, Gobius paganellus
- Spotted goby, Gobiusculus flavescens
- Guillet's goby, Lebetus guilleti
- Diminutive goby, Lebetus scorpioides
- Fries's goby, Leseurigobius friesii
- Lozano's goby, Pomatoschistus lozanoi
- Common goby, Pomatoschistus microps
- Sand goby, Potamoschistus minutus
- Norway goby, Pomatoschistus norvegicus
- Painted goby, Potamoschistus pictus
- Leopard-spotted goby, Thorogobius ephippiatus
- Wahoo, Acanthocybium solanderi
- Bullet tuna, Auxis rochei
- Frigate tuna, Auxis thazard
- Little tunny, Euthynnus alletteratus
- Skipjack tuna, Katsuwonus pelamis
- Plain bonito, Orcynopsis unicolor
- Atlantic bonito, Sarda sarda
- Atlantic chub mackerel, Scomber colias
- Spanish mackerel, Scomber japonicus
- Atlantic mackerel, Scomber scombrus
- Albacore, Thunnus alalunga
- Yellowfin tuna, Thunnus albacares
- Bigeye tuna, Thunnus obesus
- Atlantic bluefin tuna, Thunnus thynnus
