List of fish of Ireland facts for kids

This article gives a list of all species of fish found in the waters of Ireland. A separate list of freshwater fish is given at the bottom.

	Extinct	No reasonable doubt that the last individual has died.
	Extinct in the wild	Known only to survive in captivity or as a naturalized populations well outside its previous range.
	Critically endangered	The species is in imminent risk of extinction in the wild.
	Endangered	The species is facing an extremely high risk of extinction in the wild.
	Vulnerable	The species is facing a high risk of extinction in the wild.
	Near threatened	The species does not meet any of the criteria that would categorise it as risking extinction but it is likely to do so in the future.
	Least concern	There are no current identifiable risks to the species.
	Data deficient	There is inadequate information to make an assessment of the risks to this species.

Class Myxini (hagfish)

Order Myxiniformes

Family Myxinidae

• Atlantic hagfish, Myxine glutinosa
• White-headed hagfish, Myxine ios

Hyperoartia

Order Petromyzontiformes (lampreys)

Family Petromyzontidae

• European river lamprey, Lampetra fluviatilis
• European brook lamprey, Lampetra planeri
• Sea lamprey, Petromyzon marinus

Infraphylum Gnathostomata (jawed vertebrates)

Class Chondrichthyes (cartilaginous fish)

Subclass Elasmobranchii

Superorder Selachimorpha (sharks and dogfish)

Order Squantiniformes (angelsharks)

Family Squatinidae (angelsharks)

• Angel shark, Squatina squatina

Order Squaliformes (dogfishes and relatives)

Family Centrophoridae (gulper sharks)

• Leafscale gulper shark, Centrophorus squamosus
• Birdbeak dogfish, Deania calcea

Family Dalatiidae

• Kitefin shark, Dalatias licha

Family Echinorhinidae (bramble and prickly sharks

• Bramble shark, Echininorhinus brucus

Family Etmopteridae (lantern sharks)

• Black dogfish, Centroscyllium fabricii
• Velvet belly lantern shark, Etmopterus spinax
• Great lanternshark, Etmopterus princeps

Family Oxynotidae (rough sharks)

• Sailfin roughshark, Oxynotus paradoxus

Family Somniosidae (sleeper sharks)

• Portuguese dogfish, Centroscymnus coelolepis
• Longnose velvet dogfish, Centroselachus crepidater
• Smallmouth velvet dogfish, Scymnodon obscurus
• Knifetooth dogfish, Scymnodon ringens
• Greenland shark, Somniosus microcephalus

Family Squalidae (spiny dogfishes)

• Spiny dogfish, Squalus acanthias

Order Hexanchiformes (frilled and cow sharks)

Family Chlamydoselachidae (frilled sharks)

• Frilled Shark, Chlamydoselachus anguineus

Family Hexanchidae (sixgill sharks)

• Bluntnose sixgill shark, Hexanchus griseus

Order Carcharhiniformes (ground sharks)

Family Carcharhinidae (requiem sharks)

• Blue shark, Prionace glauca

Family Scyliorhinidae (catsharks)

• Iceland catshark, Apristurus laurussonii
• Ghost catshark, Apristurus manis
• Black roughscale catshark, Apristurus melanoasper
• Blackmouth catshark, Galeus melastomus
• Lesser spotted dogfish, Scyliorhinus canicula
• Nursehound, Scyliorhinus stellaris

Family Sphyrnidae (hammerhead sharks)

• Smooth hammerhead, Sphyrna zygaena

Family Triakidae (houndsharks)

• Tope, Galeorhinus galeus
• Starry smooth-hound, Mustelus asterias

Order Lamniformes (mackerel sharks)

Family Alopiidae (thresher sharks)

• Common thresher, Alopias vulpinus

Family Cetorhinidae (basking sharks)

• Basking shark, Cetorhinus maximus

Family Lamnidae (mackerel sharks)

• Porbeagle, Lamna nasus
• Shortfin mako shark, Isurus oxyrinchus

Superorder Batoidea (rays, skates and sawfishes)

Order Torpediniformes (electric rays)

• Atlantic torpedo, Tetronarce nobiliana
• Spotted torpedo, Torpedo marmorata

Order Myliobatiformes (rays)

Family Dasyatidae (whiptail stingrays)

• Common stingray, Dasyatis pastinaca
• Pelagic stingray, Pteroplatytrygon violacea

Family Myliobatidae (eagle rays)

• Common eagle ray, Myliobatis aquila

Family Mobulidae (devil rays)

• Devil fish, Mobula mobular

Order Rajiformes (skates)

Family Rajidae (skates)

• Thorny skate, Amblyraja radiata
• Blue skate, Dipturus batis
• Norwegian skate, Dipturus nidarosiensis
• Long-nosed skate, Dipturus oxyrinchus
• Sandy ray, Leucoraja circularis
• Blue ray, Neoraja caerulea
• Blonde ray, Raja brachyura
• Thornback ray, Raja clavata
• Shagreen ray, Raja fullonica
• Small-eyed ray, Raja microocellata
• Spotted ray, Raja montagui
• Cuckoo ray, Raja naevus
• Undulate ray, Raja undulata
• Deepwater ray, Rajella bathyphila
• Bigelow's ray, Rajella bigelowi
• Round ray, Rajella fylla
• Bottlenosed skate, Rostroraja alba

Subclass Holocephali

Order Chimaeriformes (chimaeras)

Family Rhinochimaeridae (longnose chimaeras)

• Narrownose chimaera, Harriotta raleighana
• Broadnose chimaera, Rhinochimaera atlantica

Family Chimaeridae (shortnose chimaeras)

• Rabbit fish, Chimaera monstrosa
• Opal chimaera, Chimaera opalescens
• Smalleyed rabbitfish, Hydrolagus affinis
• Large-eyed rabbitfish, Hydrolagus mirabilis

Superclass Osteichthyes (boned fish) - Class Actinopterygii (ray-finned fish)

Subclass Chondrostei

Order Acipenseriformes (sturgeons)

Family Acipenseridae (sturgeons)

• European sea sturgeon, Acipenser sturio

Subclass Neopterygii

Infraclass Holostei

Superorder Clupeomorpha

Order Clupeiformes (herring and anchovies)

Family Clupeidae (herring and sardines)

• Allis shad, Alosa alosa
• Twaite shad, Alosa fallax
• Atlantic herring, Clupea harengus
• Pilchard, Sardina pilchardus
• European sprat, Sprattus sprattus sprattus

Family Engraulidae (Anchovies)

• European anchovy, Engraulis encrasicolus

Superorder Elopomorpha

Order Anguilliformes (true eels)

Family Angulidae (freshwater eels)

• European eel, Anguilla anguilla

Family Congridae (conger eels)

• European conger, Conger conger

Family Muraenidae (moray eels)

• Mediterranean moray, Muraena helena

Family Nettastomatidae (duckbill eels)

• Whipsnout sorcerer, Venefica proboscidea

Family Synaphobranchidae (cutthroat eels)

• Deepwater arrowtooth eel, Histiobranchus bathybius
• Ilyophis arx
• Ilyophis blachei
• Muddy arrowtooth eel, Ilyophis brunneus
• Kaup's arrowtooth eel, Synaphobranchus kaupii

Order Notacanthiformes (halosaurs, spiny eels)

Family Halosauridae (halosaurs)

• Abyssal halosaur, Halosauropsis macrochir
• Sahara halosaur, Halosaurus johnsonianus

Family Notacanthidae (spiny eels)

• Shortfin spiny eel, Notacanthus bonaparte
• Snub-nosed spiny eel, Notacanthus chemnitzii
• Longnose tapirfish, Polyacanthonotus challengeri
• Smallmouth spiny eel, Polyacanthonotus rissoanus

Order Saccopharyngiformes (gulper eels)

Family Eurypharyngidae (pelican eels)

• Pelican eel, Eurypharynx pelecanoides

Family Saccopharyngidae (gulper eels)

• Gulper eel, Saccopharynx ampullaceus

Superorder Ostariophysi

Order Cypriniformes

Family Cyprinidae (carp and relatives)

• Common bream, Abramis brama
• Gobio gobio
• Common dace, Leuciscus leuciscus
• Common minnow, Phoxinus phoxinus
• Common roach, Rutilus rutilus
• Common rudd, Scardinius erythrophthalmus
• European chub, Squalius cephalus
• Tench, Tinca tinca

Family Nemacheilidae (stone loaches)

• Stone loach, Barbatula barbatula

Superorder Protacanthopterygii

Order Alepocephaliformes

Family Platytroctidae (tubeshoulders)

• Bighead searsid, Holtbyrnia anomala
• Maul's searsid, Maulisia mauli
• Multipore searsid, Normichthys operosus
• Schnakenbeck's searsid, Sagamichthys schnakenbecki
• Koefoed's searsid, Searsia koefoedi

Family Alepocephalidae (slickheads)

• Longfin smooth-head, Conocara macropterum
• Elongate smooth-head, Conocara microlepis
• Murray's smooth-head, Conocara murrayi
• Salmon smooth-head, Conocara salmoneum
• Agassiz' smooth-head, Leptochilichthys agassizii
• Blackhead salmon, Narcetes stomias
• Abyssal smooth-head, Rinoctes nasutus
• Softskin smooth-head, Rouleina attrita
• Bluntsnout smooth-head, Xenodermichthys copei

Order Argentiniformes

Family Microstomatidae (pencil smelts)

• Slender argentine, Microstoma microstoma
• Greenland argentine, Nansenia groenlandica
• Nansenia oblita

Family Opisthoproctidae (barreleyes)

• Barrel-eye, Opisthoproctus soleatus

Order Osmeriformes (smelts, etc.)

• European smelt, Osmerus eperlanus

Order Salmoniformes (salmon, trout, whitefish)

Family Salmonidae (salmon, trout, whitefish)

• Irish pollan, Coregonus autumnalis
• Common whitefish, Coregonus lavaretus
• Atlantic salmon, Salmo salar
• Brown trout, Salmo trutta
• Sea trout, Salmo trutta trutta
• Arctic char, Salvelinus alpinus alpinus
• Cole's char, Salvelinus colii
• Coomsaharn char, Salvelinus fimbriatus
• Gray's char, Salvelinus grayi
• Blunt-snouted Irish char, Salvelinus obtusus

Superorder Stenopterygii

Order Stomiiformes

Family Gonostomatidae (bristlemouths)

• Longray fangjaw, Bonapartia pedaliota
• Bristlemouth, Cyclothone alba
• Elongated bristlemouth, Gonostoma gonostoma
• Spark anglemouth, Sigmops bathyphilus

Family Sternoptychidae (hatchefishes and relatives)

• Mueller's pearlside, Maurolicus muelleri
• Diaphanous hatchetfish, Sternoptyx diaphana
• Constellationfish, Valenciennellus tripunctulatus

Family Phosichthyidae (lightfishes)

• Rendezvous fish, Polymetme corythaeola
• Polymetme thaeocoryla

Family Stomiidae (dragonfishes)

• Large-eye snaggletooth, Borostomias antarcticus
• Grammatostomias flagellibarba
• Leptostomias gladiator
• Boa dragonfish, Stomias boa ferox
• Threelight dragonfish, Trigonolampa miriceps

Superorder Cyclosquamata

Order Aulopiformes (grinners, lizardfishes)

Family Notosudidae (waryfishes)

• Blackfin waryfish, Scopelosaurus lepidus

Family Paralepididae (barracudinas)

• Duckbill barracudina, Magnisudis atlantica
• Sharpchin barracudina, Paralepis coregonoides
• Sudis hyalina

Superorder Scopelomorpha

Order Myctophiformes (lanternfishes)

Family Myctophidae (lanternfishes)

• Glacier lanternfish, Benthosema glaciale
• Spothead lantern fish, Diaphus metopoclampus
• White-spotted lantern fish, Diaphus rafinesquii
• Chubby flashlightfish, Electrona risso
• Myctophum punctatum
• Topside lampfish, Notolychnus valdiviae
• Diamondcheek lanternfish, Lampanyctus intricarius
• Rakery beaconlamp, Lampanyctus macdonaldi
• Cocco's lantern fish, Lobianchia gemellarii
• Arctic telescope, Protomyctophum arcticum
• Large scale lantern fish, Symbolophorus veranyi

Acanthomorpha

Order Lampriformes

Family Lampridae (opahs)

• Opah, Lampris guttatus

Family Trachipteridae (ribbonfishes)

• Deal fish, Trachipterus arcticus

Order Zeiformes (dories, etc.)

Family Zeidae (dories)

• John Dory, Zeus faber

Family Oreosomatidae (oreos)

• False boarfish, Neocyttus helgae

Order Gadiformes (cod and relatives)

Family Gadidae (cod and relatives)

• Silvery cod, Gadiculus argenteus argenteus
• Silvery pout, Gadiculus argenteus thori
• Atlantic cod, Gadus morhua
• Haddock, Melanogrammus aeglefinus
• Whiting, Marlangius merlangus
• Blue whiting, Micromesistius poutassou
• Pollock, Pollachius pollachus

• Saithe, Pollachius virens
• Tadpole fish, Raniceps raninus
• Norway pout, Trisopterus esmarkii
• Pouting, Trisopterus luscus
• Poor cod, Trisopterus minutus

Family Lotidae (lings)

• Cusk, Brosme brosme
• Fivebeard rockling, Ciliata mustela
• Northern rockling, Ciliata septentrionalis
• Fourbeard 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
• Spanish ling, Molva macrophthalma
• Common ling, Molva molva

Family Macrouridae (grenadiers or rattails)

• Hollowsnout grenadier, Coelorinchus caelorhincus
• Spearsnouted grenadier, Coelorinchus labiatus
• Abyssal grenadier, Coryphaenoides armatus
• Coryphaenoides brevibarbis
• Carapine grenadier, Coryphaenoides carapinus
• Günther's grenadier, Coryphaenoides guentheri
• Ghostly grenadier, Coryphaenoides leptolepis
• Mediterranean grenadier, Coryphaenoides mediterraneus
• Deepwater grenadier, Coryphaenoides profundicolus
• Roundnose grenadier, Coryphaenoides rupestris
• Glasshead grenadier, Hymenocephalus italicus

• Onion-eye grenadier, Macrourus berglax
• Softhead grenadier, Malacocephalus laevis
• Common Atlantic grenadier, Nezumia aequalis
• Pseudonezumia flagellicauda

Family Merlucciidae (hakes)

• Lyconus brachycolus
• European hake, Merluccius merluccius

Family Moridae (codlings)

• Common mora, Mora moro
• Guttigadus latifrons
• Slender codling, Halargyreus johnsonii
• North Atlantic codling, Lepidion eques

Family Phycidae (forkbeard hakes)

• Greater forkbeard, Phycis blennoides

Family Trachyrincidae

• Roughnose grenadier, Trachyrincus murrayi
• Roughsnout grenadier, Trachyrincus scabrus

Superorder Acanthopterygii

Order Beryciformes (alfonsinos, bigscales, ridgeheads)

Family Berycidae (alfonsinos)

• Alfonsino, Beryx decadactylus

Family Melamphaidae (bigscales)

• Crested bigscale, Poromitra crassiceps
• Bean's bigscale, Scopelogadus beanii

Oder Trachichthyiformes (spinyfins, roughies and relatives)

Family Diremtidae (spinyfins)

• Silver spinyfin, Diretmus argenteus

Family Trachichthyidae (roughies and slimeheads)

• Orange roughy, Hoplostethus atlanticus
• Silver roughy, Hoplostethus mediterraneus mediterraneus

Clade Percomorpha

Series Ophidiimorpharia

Order Ophidiiformes (cusk-eels, brotulas and relatives)

Family Aphyonidae

• Sciadonus galatheae

Family Bythitidae (viviparous brotulas)

• Cataetyx alleni
• Cataetyx laticeps
• Thalassobathia pelagica

Family Carapidae (pearlfishes)

• Pearlfish, Echiodon drummondii

Family Ophidiidae (cusk-eels)

• Pudgy cuskeel, Spectrunculus grandis

Series Gobiomorpharia

Order Gobiiformes (gobies and relatives)

Family Gobiidae (gobies)

• Transparent goby, Aphia minuta
• Jeffrey's goby, Buenia jeffreysii
• Crystal goby, Crystallogobius linearis
• Couch's goby, Gobius couchi
• Red-mouthed goby, Gobius cruentatus
• Black goby, Gobius niger
• Rock goby, Gobius paganellus
• Two-spotted goby, Gobiusculus flavescens
• Lesueurigobius friesii
• Lozano's goby, Pomatoschistus lozanoi
• Common goby, Pomatoschistus microps
• Sand gobyPomatoschistus minutus
• Painted goby, Pomatoschistus pictus
• Leopard-spotted goby, Thorogobius ephippiatus

Series Scombrimorpharia

Order Syngnathiformes (pipefishes, seahorses, dragonettes and relatives)

Family Callionymidae (dragonettes)

• Common dragonet, Callionymus lyra
• Callionymus maculatus
• Reticulated dragonet, Callionymus reticulatus

Family Mullidae (goatfishes)

• Red mullet, Mullus barbatus barbatus
• Striped red mullet, Mullus surmuletus

Family Syngnathidae (seahorses and pipefishes)

• Snake pipefish, Entelurus aequoreus
• Long-snouted seahorse, Hippocampus guttulatus
• Worm pipefish, Nerophis lumbriciformis
• Straightnose pipefish, Nerophis ophidion
• Greater pipefish, Syngathus acus
• Nilsson's pipefish, Syngnathus rostellatus
• Broad-nosed pipefish, Syngnathus typhle

Order Scombriformes (tuna, mackerel and relatives; sensu Betancur-Rodriguez et al. 2016)

Family Bramidae (pomfrets)

• Atlantic pomfret, Brama brama
• Bigscale pomfret, Taractichthys longipinnis

Family Centrolophidae (medusafishes)

• Barrelfish, Hyperoglyphe perciformis
• Cornish blackfish, Schedophilus medusophagus

Family Gempylidae (snake mackerels)

• Black gemfish, Nesiarchus nasutus
• Oilfish, Ruvettus pretiosus

Family Nomeidae (driftfishes) Family Scombridae (tuna, mackerel and bonitos)

• Bullet tuna, Auxis rochei rochei
• Frigate tuna, Auxis thazard thazard
• Skipjack tuna, Katsuwonus pelamis
• Atlantic bonito, Sarda sarda
• Atlantic mackerel, Scomber scombrus
• Albacore, Thunnus alalunga
• Atlantic bluefin tuna, Thunnus thynnus

Family Trichiuridae (cutlassfishes and scabbardfishes)

• Black scabbardfish, Aphanopus carbo
• Silver scabbardfish, Lepidopus caudatus
• Largehead hairtail, Trichiurus lepturus

Series Carangimorpharia

Order Istiophoriformes (billfishes)

Family Xiphiidae (swordfish)

• Swordfish, Xiphias gladius

Order Caranagiformes (jacks and relatives)

Family Carangidae (jacks and relatives)

• Vadigo, Campogramma glaycos
• Derbio, Trachinotus ovatus
• Atlantic horse mackerel, Trachurus trachurus

Order Pleuronectiformes (flatfishes)

Family Pleuronectidae (righteye flounders)

• American plaice, Hippoglossoides platessoides
• Atlantic halibut, Hippoglossus hippoglossus
• Torbay sole, Glyptocephalus cynoglossus
• Dab, Limanda limanda
• Lemon sole, Microstomus kitt
• European flounder, Platichthys flesus
• European plaice, Pleuronectes platessa

• Greenland halibut, Reinhardtius hippoglossoides

Family Scophthalmidae (turbots)

• Fourspotted megrim, Lepidorhombus boscii
• Megrim, Lepidorhombus whiffiagonis
• Norwegian topknot, Phrynorhombus norvegicus
• Turbot, Scophthalmus maximus
• Brill, Scophthalmus rhombus
• Topknot, Zeugopterus punctatus
• Eckström's topknot, Zeugopterus regius

Family Soleidae (true soles)

• Solenette, Buglossidium luteum
• Thickback sole, Microchirus variegatus
• Common sole, Solea solea

Order Beloniformes

Family Belonidae (needlefishes)

• Garfish, Belone belone
• Belone svetovidovi

Family Scomberesocidae (sauries)

• Atlantic saury, Scomberesox saurus saurus

Order Atheriniformes (silversides)

Family Atherinidae (silversides)

• Sand smelt, Atherina presbyter

Order Mugiliformes (mullets)

Family Mugilidae (mullets)

• Thicklip grey mullet, Chelon labrosus
• Golden grey mullet, Liza aurata
• Thin-lipped grey mullet, Liza ramado

Order Gobiesociformes (clingfishes)

Family Gobiesocidae (clingfishes)

• Two-spotted clingfish, Diplecogaster bimaculata
• Connemarra clingfish, Lepadogaster candolii

Order Belnniiformes (blennies and relatives)

Family Blenniidae (combtooth blennies)

• Montagu's blenny, Coryphoblennius galerita
• Lipophrys pholis
• Tompot blenny, Parablennius gattorugine

Order Uranoscopiformes (weevers, stargazers and relatives; sensu Betancur-Rodriguez et al. 2016)

Family Ammodytidae (sandlances)

• Raitt's sand eel, Ammodytes marinus
• Lesser sand eel, Ammodytes tobianus
• Smooth sandeel, Gymnammodytes semisquamatus
• Great sand eel, Hyperoplus immaculatus
• Great sandeel, Hyperoplus lanceolatus

Family Trachinidae (weeverfishes)

• Lesser weever, Echiichthys vipera
• Greater weever, Trachinus draco

Family Uranoscopidae (stargazers)

• Atlantic stargazer, Uranoscopus scaber

Order Labriformes (wrasses sensu Betancur-Rodriguez et al. 2016)

Family Labridae (wrasses)

• Rock cook, Centrolabrus exoletus
• Goldsinny wrasse, Ctenolabrus rupestris
• Ballan wrasse, Labrus bergylta
• Cuckoo wrasse, Labrus mixtus
• Baillon's wrasse, Symphodus bailloni
• Corkwing wrasse, Symphodus melops

Order Pempheriformes (sensu Betancur-Rodriguez et al. 2016)

Family Epigonidae (deepwater cardinalfishes)

• Bulls-eye, Epigonus telescopus

Family Polyprionidae (wreckfishes)

• Wreckfish, Polyprion americanus

Order Perciformes (sensu Betancur-Rodriguez et al. 2016)

Suborder Percoidei (sensu Betancur-Rodriguez et al. 2016)

Family Percidae (perches)

• European perch, Perca fluviatilis

Suborder Triglioidei (searobins and gurnards)

Family Triglidae (searobins and gurnards)

• Tub gurnard, Chelidonichthys lucerna
• Longfin gurnard, Chelidonichthys obscurus
• Grey gurnard, Eutrigla gurnardus

Suborder Scorpaenoidei (scorpionfish, rockfishes and relatives)

Family Sebastidae (rockfishes)

• Blackbelly rosefish, Helicolenus dactylopterus dactylopterus
• Norway redfish, Sebastes viviparus
• Spiny scorpionfish, Trachyscorpia cristulata echinata

Suborder Cottoidei (sculpins, eelpouts, sticklebacks and relatives)

Infraorder Zoarcales (eelpouts, wolffishes and relatives)

Family Anarhichadidae (wolffishes)

• Atlantic wolf fish, Anarhichas lupus

Family Pholidae (gunnels)

• Rock gunnel, Pholis gunnellus

Family Stichaeidae (pricklebacks)

• Yarrell's blenny, Chirolophis ascanii

Family Zoarcidae (eelpouts)

• White eelpout, Lycenchelys alba
• Lycodes terraenovae
• Snubnose eelpout, Pachycara bulbiceps
• Pachycara crassiceps
• Viviparous blenny, Zoarces viviparus

Infraorder Gasterosteales (sticklebacks, etc.)

Family Gasterosteidae (sticklebacks)

• Three-spined stickleback, Gasterosteus aculeatus aculeatus
• Nine-spined stickleback, Pungitius pungitius
• Sea stickleback, Spinachia spinachia

Infraorder Cottales (sculpins, snailfishes, lumpfishes and relatives)

Family Cottidae (sculpins)

• European bullhead, Cottus gobio
• Norway bullhead, Micrenophrys lilljeborgii
• Shorthorn sculpin, Myoxocephalus scorpius
• Longspined sea-scorpion, Taurulus bubalis

Family Cyclopteridae (lumpsuckers)

• Lumpsucker, Cyclopterus lumpus

Family Liparidae (snailfishes)

• Careproctus aciculipunctatus
• Merret's snailfish, Careproctus merretti
• Common seasnail, Liparis liparis liparis
• Montagu's sea snail, Liparis montagui
• Paraliparis abyssorum
• Black seasnail, Paraliparis bathybius
• Paraliparis bipolaris
• Paraliparis hystrix

Family Psychrolutidae (fatheads and blobfishes)

• Pallid sculpin, Cottunculus thomsonii

Order Moroniformes (temperate basses sensu Betancur-Rodriguez et al. 2016)

Family Moronidae (temperate basses)

• European seabass, Dicentrarchus labrax

Order Spariformes (seabreams and relatives sensu Betancur-Rodriguez et al. 2016)

Family Sparidae (seabreams and progies)

• Bogue, Boops boops
• Common dentex, Dentex dentex
• Blackspot seabream, Pagellus bogaraveo
• Common pandora, Pagellus erythrinus
• Gilt-head bream, Sparus aurata
• Black seabream, Spondyliosoma cantharus

Order Priacanthiformes (bigeyes and bandfishes sensu Betancur-Rodriguez et al. 2016)

Family Cepolidae (bandfishes)

• Red bandfish, Cepola macrophthalma

Order Caproiformes (boarfishes sensu Betancur-Rodriguez et al. 2016)

Family Caproidae (boarfishes)

• Boarfish, Capros oper

Order Lophiiformes (anglerfishes)

Suborder Lophoidei (monkfishes)

Family Lophiidae (monkfishes)

• Black-bellied angler, Lophius budegassa
• Monkfish, Lophius piscatorius

Suborder Lophoidei (monkfishes)

Family Oneirodidae (dreamers)

• Can-opener smoothdream, Chaenophryne longiceps
• Oneirodes carlsbergi
• Bulbous dreamer, Oneirodes eschrichtii

Order Tetraodontiformes (pufferfishes, triggerfishes, molas)

Family Molidae (molas)

• Ocean sunfish, Mola mola
• Slender sunfish, Ranzania laevis

Family Tetraodontidae (pufferfishes)

• Blunthead puffer, Sphoeroides pachygaster

Freshwater fish

It has been argued that only nine species of freshwater fish are truly native to Ireland — five char species, pollan, eel, brown trout and Atlantic salmon — as Ireland's fresh water was entirely frozen during the last glacial period, only diadromous fish could repopulate Irish waters after the Ice Age. All other freshwater species were introduced, mostly from the Middle Ages onwards.

• European river lamprey, Lampetra fluviatilis
• European brook lamprey, Lampetra planeri
• Sea lamprey, Petromyzon marinus
• European eel, Anguilla anguilla
• Allis shad, Alosa alosa
• Twaite shad, Alosa falax fallax
• Common dace, Leuciscus leuciscus
• Common minnow, Phoxinus phoxinus
• Gudgeon, Gobio gobio
• Common roach, Rutilus rutilus
• Common rudd, Scardinius erythrophthalmus
• European chub, Squalius cephalus
• Common bream, Abramis brama
• Stone loach, Nemacheilus barbatulus
• Tench, Tinca tinca
• Northern pike, Esox lucius
• European smelt, Osmerus eperlanus
• Atlantic salmon, Salmo salar
• Arctic char, Salvelinus alpinus alpinus
• Cole's char, Salvelinus colii
• Coomsaharn char, Salvelinus fimbriatus
• Gray's char, Salvelinus grayi
• Blunt-snouted Irish char, Salvelinus obtusus
• Brown trout, Salmo trutta
• Irish pollan, Coregonus autumnalis
• Three-spined stickleback, Gasterosteus aculeatus aculeatus
• Nine-spined stickleback, Pungitius pungitius
• European bullhead, Cottus gobio
• Norway bullhead, Taurulus lilljeborgi