# Rhestr o greaduriaid morol gwledydd Prydain

Dyma restr o greaduriaid a ellir eu canfod ar arfordiroedd gwledydd Prydain; daw'r enwau Cymraeg o gronfa Cymdeithas Edward Llwyd o enwau. Gweler hefyd rhestr *Y Bywiadur* Llên Natur.

>>trefn yr wyddor ... gwaith ar y gweill ...<<

Cymraeg - Saesneg - Lladin
* Aderyn drycin bach, Little shearwater, *Puffinus assimilis*
* Aderyn drycin mawr, Great shearwater, *Puffinus gravis*
* Aderyn drycin Manaw, Manx shearwater, *Puffinus puffinus*
* Aderyn drycin y graig, Northern fulmar, *Fulmarus glacialis*
* Alarch dof, Mute swan, *Cygnus olor*
* Alarch y Gogledd, Whooper swan, *Cygnus cygnus*
* Albatros aelddu, Black-browed albatross, *Diomedea melanophris*
* Bonito, Atlantic bonito, *Sarda sarda*
* Brithyll, Brown trout, *Salmo trutta*
* Brwyniad, European anchovy, *Engraulis encrasicolus*
* Cambig, Pied avocet, *Recurvirostra avosetta*
* Carfil bach, Little auk, *Alle alle*
* Cegddu, European hake, *Merluccius merluccius*
* Cerpyn, Common carp, *Cyprinus carpio*
* Codyn Ebrill, Poor cod, *Trisopterus minutus*
* Coegleiddiad, False killer whale, *Pseudorca crassidens*
* Coegylfinir, Whimbrel, *Numenius phaeopus*
* Coegylfinir bach, Little curlew, *Numenius minutus*
* Congren, European conger, *Conger conger*
* Corhwyaden, Eurasian teal, *Anas crecca*
* Corhwyaden asgell-las, Blue-winged teal, *Anas discors*
* Corhwyaden asgellwerdd, Green-winged teal, *Anas crecca carolinensis*
* Corbennog, European sprat, *Sprattus sprattus*
* Cornbig, Garfish, *Belone belone*
* Corswennol adeinwen, White-winged tern, *Chlidonias leucopterus*
* Corswennol ddu, Black tern, *Chlidonias niger*
* Corswennol farfog, Whiskered tern, *Chlidonias hybrida*
* Crëyr bach, Little egret, *Egretta garzetta*
* Crychyn, Ruffe, *Gymnocephalus cernuus*
* Cwtiad aur, European golden plover, *Pluvialis apricaria*
* Cwtiad Caint, Kentish plover, *Charadrius alexandrinus*
* Cwtiad heidiol, Sociable lapwing, *Vanellus gregarius*
* Cwtiad llwyd, Grey plover, *Pluvialis squatarola*
* Cwtiad torchog, Common ringed plover, *Charadrius hiaticula*
* Cwtiad torchog bach, Little ringed plover, *Charadrius dubius*
* Cwtiad torchog mawr, Killdeer, *Charadrius vociferus*
* Cwtiad tywod mawr, Greater sand plover, *Charadrius leschenaultii*
* Cwtiad y traeth, Ruddy turnstone, *Arenaria interpres*
* Cwtiad-wennol adeinddu, Black-winged pratincole, *Glareola nordmanni*
* Cwtiad-wennol torchog, Collared pratincole, *Glareola pratincola*
* Chwiwell, Eurasian wigeon, *Anas penelope*
* Darsen, Common dace, *Leuciscus leuciscus*
* Drymiwr, Stone bass, *Argyrosomus regius*
* Dwrgi, European otter, *Lutra lutra*
* Eog, Atlantic salmon, *Salmo salar*
* Eryr moel, Bald eagle, *Haliaeetus leucocephalus*
* Eryr môr, White-tailed eagle, *Haliaeetus albicilla*
* Fendas, Vendace, *Coregonus albula*
* Gïach bach, Jack snipe, *Lymnocryptes minimus*
* Gïach gylfinhir, Long-billed dowitcher, *Limnodromus scolopaceus*
* Gïach mawr, Great snipe, *Gallinago media*
* Gobi, Common goby, *Pomatoschistus microps*
* Gobi Norwy, Norway goby, *Pomatoschistus norvegicus*
* Gobi tryloyw, Transparent goby, *Aphia minuta*
* Gorwyniad, Common bleak, *Alburnus alburnus*
* Gwangen, Twait shad, *Alosa fallax*
* Gweflogyn, Viviparous eelpout, *Zoarces viviparus*
* Gwrachen Baillon, Baillon's wrasse, *Crenilabrus bailloni*
* Gwyach fach, Little grebe, *Tachybaptus ruficollis*
* Gwyach fawr gopog, Great crested grebe, *Podiceps cristatus*
* Gwyach gorniog, Horned grebe, *Podiceps auritus*
* Gwyach yddfddu, Black-necked grebe, *Podiceps nigricollis*
* Gwyach yddfgoch, Red-necked grebe, *Podiceps grisegena*
* Gwyach ylfinfraith, Pied-billed grebe, *Podilymbus podiceps*
* Gŵydd Canada, Canada goose, *Branta canadensis*
* Gŵydd dalcenwen, Greater white-fronted goose, *Anser albifrons*
* Gŵydd dalcenwen fechan, Lesser white-fronted goose, *Anser erythropus*
* Gŵydd droedbinc, Pink-footed goose, *Anser brachyrhynchus*
* Gŵydd ddu, Brant goose, *Branta bernicla*
* Gŵydd frongoch, Red-breasted goose, *Branta ruficollis*
* Gŵydd lwyd, Greylag goose, *Anser anser*
* Gŵydd wyran, Barnacle goose, *Branta leucopsis*
* Gŵydd y llafur, Bean goose, *Anser fabalis*
* Gwylan Bonaparte, Bonaparte's gull, *Larus philadelphia*
* Gwylan Franklin, Franklin's gull, *Larus pipixcan*
* Gwylan Ross, Ross's gull, *Rhodostethia rosea*
* Gwylan Sabine, Sabine's gull, *Larus sabini*
* Gwylog, Common guillemot, *Uria aalge*
* Gwylog ddu, Black guillemot, *Cepphus grylle*
* Gylfinir, Eurasian curlew, *Numenius arquata*
* Hadog, Haddock, *Melanogrammus aeglefinus*
* Herlyn, Allis shad, *Alosa alosa*
* Heulforgi, Basking shark, *Cetorhinus maximus*
* Honos, Common ling, *Molva molva*
* Howtin, Houting, *Coregonus oxyrinchus*
* Hugan, Northern gannet, *Sula bassana*
* Hwyaden addfain, Garganey, *Anas querquedula*
* Hwyaden benddu, Greater scaup, *Aythya marila*
* Hwyaden bengoch, Common pochard, *Aythya ferina*
* Hwyaden benwen, White-headed duck, *Oxyura leucocephala*
* Hwyaden dorchog, Ring-necked duck, *Aythya collaris*
* Hwyaden ddanheddog, Common merganser, *Mergus merganser*
* Hwyaden ddu, American black duck, *Anas rubripes*
* Hwyaden frongoch, Red-breasted merganser, *Mergus serrator*
* Hwyaden fwythblu, Common eider, *Somateria mollissima*
* Hwyaden fwythblu'r Gogledd, King eider, *Somateria spectabilis*
* Hwyaden goch, Ruddy duck, *Oxyura jamaicensis*
* Hwyaden goch yr eithin, Ruddy shelduck, *Tadorna ferruginea*
* Hwyaden gopog, Tufted duck, *Aythya fuligula*
* Hwyaden gribgoch, Red-crested pochard, *Netta rufina*
* Hwyaden gribog, Mandarin duck, *Aix galericulata*
* Hwyaden lostfain, Northern pintail, *Anas acuta*
* Hwyaden lwyd, Gadwall, *Anas strepera*
* Hwyaden lygad-aur, Common goldeneye, *Bucephala clangula*
* Hwyaden wyllt, Mallard, *Anas platyrhynchos*
* Hwyaden yr eithin, Common shelduck, *Tadorna tadorna*
* Hyrddyn aur, Golden grey mullet, *Liza aurata*
* Hyrddyn llwyd minfain, Thinlip mullet, *Liza ramada*
* Hyrddyn llwyd gweflog, Thicklip grey mullet, *Chelon labrosus*
* Ibis du, Glossy ibis, *Plegadis falcinellus*
* Lleden Ffrengig, Atlantic halibut, *Hippoglossus hippoglossus*
* Lleden Thor, Thor's scaldfish, *Arnoglossus thori*
* Lleden yr Ynys Las, Greenland halibut, *Reinhardtius hippoglossoides*
* Lleian wen, Smew, *Mergus albellus*
* Lleiddiad, Killer whale, *Orcinus orca*
* Llurs, Razorbill, *Alca torda*
* Llyfrothen, Rock gunnel, *Pholis gunnellus*
* Llyfrothen Montagu, Montagu's blenny, *Coryphoblennius galerita*
* Llymrïen, Lesser sand eel, *Ammodytes tobianus*
* Llysywen, European eel, *Anguilla anguilla*
* Macrell, Atlantic mackerel, *Scomber scombrus*
* Macrell Sbaen, Chub mackerel, *Scomber japonicus*
* Maelgi, Angelshark, *Squatina squatina*
* Marchfacrell, Atlantic horse mackerel, *Trachurus trachurus*
* Marlin, Skipjack tuna, *Euthynnus pelamis*
* Melyngoes bach, Lesser yellowlegs, *Tringa flavipes*
* Melyngoes mawr, Greater yellowlegs, *Tringa melanoleuca*
* Merfog, Common bream, *Abramis brama*
* Mingrwn, Striped red mullet, *Mullus surmuletus*
* Morflaidd, Atlantic wolffish, *Anarhichas lupus*
* Morflaidd brith, Spotted wolffish, *Anarhichas minor*
* Morgi, Small-spotted catshark, *Scyliorhinus canicula*
* Morgi'r Ynys Las, Greenland shark, *Somniosus microcephalus*
* Môr-hwyaden ddu, Common scoter, *Melanitta nigra*
* Môr-hwyaden y Gogledd, Velvet scoter, *Melanitta fusca*
* Môr-hwyaden yr ewyn, Surf scoter, *Melanitta perspicillata*
* Morlas, Atlantic pollack, *Pollachius pollachius*
* Môr-wennol fawr, Royal tern, *Sterna maxima*
* Môr-wennol fechan, Little tern, *Sterna albifrons*
* Môr-wennol Forster, Forster's tern, *Sterna forsteri*
* Môr-wennol fraith, Sooty tern, *Sterna fuscata*
* Môr-wennol ffrwynog, Bridled tern, *Sterna anaethetus*
* Môr-wennol gribog leiaf, Lesser crested tern, *Sterna bengalensis*
* Môr-wennol gawraidd, Caspian tern, *Sterna caspia*
* Môr-wennol gyffredin, Common tern, *Sterna hirundo*
* Môr-wennol wridog, Roseate tern, *Sterna dougallii*
* Môr-wennol y Gogledd, Arctic tern, *Sterna paradisaea*
* Môr-wennol ylfinbraff, Gull-billed tern, *Gelochelidon nilotica*
* Mulfran, Great cormorant, *Phalacrocorax carbo*
* Mulfran werdd, European shag, *Phalacrocorax aristotelis*
* Orff, Ide, *Leuciscus idus*
* Pâl, Atlantic puffin, *Fratercula arctica*
* Pandora, Common pandora, *Pagellus erythrinus*
* Pedryn Bulwer, Bulwer's petrel, *Bulweria bulwerii*
* Pedryn drycin, European storm petrel, *Hydrobates pelagicus*
* Pedryn drycin Leach, Leach's storm petrel, *Oceanodroma leucorhoa*
* Pedryn Wilson, Wilson's storm petrel, *Oceanites oceanicus*
* Penbwl môr, Pogge, *Agonus cataphractus*
* Pencath, Wels catfish, *Silurus glanis*
* Penfras y Gogledd, Boreogadus saida, *Boreogadus saida*
* Penhwyad, Northern pike, *Esox lucius*
* Penlletwad, European bullhead, *Cottus gobio*
* Pibydd Baird, Baird's sandpiper, *Calidris bairdii*
* Pibydd cambig, Curlew sandpiper, *Calidris ferruginea*
* Pibydd cain, Pectoral sandpiper, *Calidris melanotos*
* Pibydd coesgoch, Common redshank, *Tringa totanus*
* Pibydd coesgoch mannog, Spotted redshank, *Tringa erythropus*
* Pibydd coeswerdd, Common greenshank, *Tringa nebularia*
* Pibydd cynffonlwyd, Grey-tailed tattler, *Tringa brevipes*
* Pibydd du, Purple sandpiper, *Calidris maritima*
* Pibydd bach, Little stint, *Calidris minuta*
* Pibydd llwyd, Semipalmated sandpiper, *Calidris pusilla*
* Pibydd llydanbig, Broad-billed sandpiper, *Limicola falcinellus*
* Pibydd Temminck, Temminck's stint, *Calidris temminckii*
* Pibydd tinwen, white-rumped sandpiper, *Calidris fusicollis*
* Pibydd y dorlan, Common sandpiper, *Actitis hypoleucos*
* Pibydd y gors, Marsh sandpiper, *Tringa stagnatilis*
* Pibydd y mawn, Dunlin, *Calidris alpina*
* Pibydd y tywod, Sanderling, *Calidris alba*
* Pibydd yr aber, Red knot, *Calidris canutus*
* Pilcodyn, Common minnow, *Phoxinus phoxinus*
* Polan, Arctic cisco, *Coregonus autumnalis*
* Powan, Lavaret, *Coregonus lavaretus*
* Rhedwr moelydd, Eurasian stone-curlew, *Burhinus oedicnemus*
* Rhedwr twyni, Cream-coloured courser, *Cursorius cursor*
* Rhegen Baillon, Baillon's crake, *Porzana pusilla*
* Rhegen yr ŷd, Corn crake, *Crex crex*
* Rhufell, Common roach, *Rutilus rutilus*
* Salpa, Salema porgy, *Sarpa salpa*
* Sgipiwr, Atlantic saury, *Scomberesox saurus*
* Sgiwen fach, Pomarine skua, *Stercorarius pomarinus*
* Sgiwen fawr, Great skua, *Stercorarius skua*
* Sgiwen lostfain, Long-tailed skua, *Stercorarius longicaudus*
* Sgiwen Pegwn y De, South Polar skua, *Stercorarius maccormicki*
* Sgiwen y Gogledd, Arctic skua, *Stercorarius parasiticus*
* Sgreten, Tench, *Tinca tinca*
* Styrsiwn, European sea sturgeon, *Acipenser sturio*
* Swtan barfog bach, Tadpole fish, *Raniceps raninus*
* Swtan Norwy, Norway pout, *Trisopterus esmarkii*
* Tiwna, Atlantic bluefin tuna, *Thunnus thynnus*
* Torsg, Cusk, *Brosme brosme*
* Torbwt, Turbot, *Scophthalmus maximus*
* Trochydd gyddfddu, Black-throated diver, *Gavia arctica*
* Trochydd gyddfgoch, Red-throated diver, *Gavia stellata*
* Trochydd mawr, Great Northern diver, *Gavia immer*
* Trochydd pigwyn, White-billed diver, *Gavia adamsii*

* Gwrachen Gennog, Scale-rayed wrasse, Acantholabrus palloni
* Llwynog Môr, Common thresher, Alopias vulpinus
* Morflaidd Brith Danheddog, Northern wolffish, Anarhichas denticulatus
* Pysgodyn Arian Mawr, Greater argentine, Argentina silus
* Pysgodyn Arian Bach, argentine, Argentina sphyraena
* Ysgyfarnog Fôr, Red gurnard, Aspitrigla cuculus
* Pysgodyn Ystlys-Arian Cennog, Big-scale sand smelt, Atherina boyeri
* Pysgodyn Ystlys-Arian, Sand smelt, Atherina presbyter
* Macrell Roche, Bullet tuna, Auxis rochei
* Morfil Pigfain, Common minke whale, Balaenoptera acutorostrata
* Morfil Asgellog Sei, Sei whale, Balaenoptera borealis
* Morfil Asgellog Glas, Blue whale, Balaenoptera musculus
* Morfil Asgellog Llwyd, Fin whale, Balaenoptera physalus
* Pysgodyn Clicied, Grey triggerfish, Balistes carolinensis
* Llyfrothen Adeiniog, Butterfly blenny, Blennius ocellaris
* Merfog Gwyn, Silver bream, Blicca bjoerkna
* Pysgodyn Llygad-Llo, Boops boops, Boops boops
* Merfog Môr, Atlantic pomfret, Brama brama
* Lleden Felen Fach, Solenette, Buglossidium luteum
* Bwgan Dŵr, Common dragonet, Callionymus lyra
* Bwgan Brith, Spotted dragonet, Callionymus maculatus
* Crwban Môr Pendew, Loggerhead sea turtle, Caretta caretta
* Pysgodyn Du, Rudderfish, Centrolophus niger
* Crwban Môr Gwyrdd, Green sea turtle, Chelonia mydas
* Cwningen Fôr, Rabbit fish, Chimaera monstrosa
* Brithyll Mair Pum-Barf, Fivebeard rockling, Ciliata mustela
* Hwyaden Gynffon-Hir, Long-tailed duck, Clangula hyemalis
* Pennog (Neu Ysgadenyn), Atlantic herring, Clupea harengus
* Gwrachen Seithliw, Mediterranean rainbow wrasse, Coris julis
* Cynffon Llygoden, Coryphaenoides rupestris, Coryphaenoides rupestris
* Gwrachen Eurben, Corkwing wrasse, Crenilabrus melops
* Gobi Gwydraidd, Crystal goby, Crystallogobius linearis
* Gwrachen Fair, Goldsinny wrasse, Ctenolabrus rupestris
* Iâr Fôr, Cyclopterus lumpus, Cyclopterus lumpus
* Morlo Cycyllog, Hooded seal, Cystophora cristata
* Morgath Ddu, Common stingray, Dasyatis pastinaca
* Morfil Gwyn, Beluga whale, Delphinapterus leucas
* Dolffin Cyffredin, Short-beaked common dolphin, Delphinus delphis
* Merfog Ysgithrog, Common dentex, Dentex dentex
* Crwban Môr Cefn-Lledr, Leatherback sea turtle, Dermochelys coriacea
* Draenogyn Mor, European seabass, Dicentrarchus labrax
* Môr-Wiber Fach, Lesser weever, Echiichthys vipera
* Brithyll Mair Pedair-Barf, Fourbeard rockling, Enchelyopus cimbrius
* Crwban Môr Gwalchbig, Hawksbill sea turtle, Eretmochelys imbricata
* Morlo Barfog, Bearded seal, Erignathus barbatus
* Morgi Seithliw, Velvet belly lanternshark, Etmopterus spinax
* Tiwna Bach, Little tunny, Euthynnus alletteratus
* Chwyrnwr Llwyd, Grey gurnard, Eutrigla gurnardus
* Swtan Arian, Silvery pout, Gadiculus argenteus
* Penfras (Neu Codyn), Atlantic cod, Gadus morhua
* Penfras Yr Ynys Las, Greenland cod, Gadus ogac
* Brithyll Mair Tair-Barf, Three-bearded rockling, Gaidropsarus vulgaris
* Ci Glas, School shark, Galeorhinus galeus
* Morgi Cegddu, Blackmouth catshark, Galeus melastomus
* Crothell Dri Phigyn, Three-spined stickleback, Gasterosteus aculeatus
* Morfil Pengrwn, Long-finned pilot whale, Globicephala melas
* Lleden Wrach, Witch (righteye flounder), Glyptocephalus cynoglossus
* Llyfrothen Dŵr Croyw, Gobio gobio, Gobio gobio
* Gobi Mawr, Giant goby, Gobius cobitis
* Gobi Couch, Couch's goby, Gobius couchi
* Gobi Mingoch, Red-mouthed goby, Gobius cruentatus
* Gobi Du, Black goby, Gobius niger
* Bill Bigog, Rock goby, Gobius paganellus
* Dolffin Risso, Risso's dolphin, Grampus griseus
* Pioden Fôr, Eurasian Oystercatcher, Haematopus ostralegus
* Morlo Llwyd, Grey seal, Halichoerus grypus
* Hirgoes, Black-winged stilt, Himantopus himantopus
* Morfil Trwyn Potel, Northern bottlenose whale, Hyperoodon ampullatus
* Sgorpion Môr Deugorn, Twohorn sculpin, Icelus bicornis
* Pysgodyn Hwyliog, Indo-Pacific sailfish, Istiophorus platypterus
* Morfil Sberm Lleiaf, Pygmy sperm whale, Kogia breviceps
* Cleiriach Y Gwymon, Ballan wrasse, Labrus bergylta
* Gwrachen Resog, Cuckoo wrasse, Labrus mixtus
* Dolffin Ystlyswyn, Atlantic white-sided dolphin, Lagenorhynchus acutus
* Dolffin Pigwyn, White-beaked dolphin, Lagenorhynchus albirostris
* Corgi Môr, Porbeagle, Lamna nasus
* Llysywen Bendoll Yr Afon, European river lamprey, Lampetra fluviatilis
* Gwylan Y Penwaig, European herring gull, Larus argentatus
* Gwylan Chwerthinog, Laughing gull, Larus atricilla
* Gwylan Y Gweunydd, Common gull, Larus canus
* Gwylan Fodrwybig, Ring-billed gull, Larus delawarensis
* Gwylan Gefnddu Leiaf, Lesser black-backed gull, Larus fuscus
* Gwylan Yr Arctig, Iceland gull, Larus glaucoides
* Gwylan y Gogledd, Glaucous gull, *Larus hyperboreus*
* Gwylan Môr y Canoldir, Mediterranean gull, *Larus melanocephalus*
* Gwylan Fechan, Little gull, Larus minutus
* Gwylan Benddu, Black-headed gull, Larus ridibundus
* Lleden Fair Bedwar-Smotyn, Lepidorhombus boscii, Lepidorhombus boscii
* Gobi Fries, Fries's goby, Lesuerigobius friesii
* Twb Y Dail, European chub, Leuciscus cephalus
* Lleden Dywod, Common dab, Limanda limanda
* Rhostog Gynffonfraith, Bar-tailed godwit, Limosa lapponica
* Iâr Fôr Lysnafeddog, Common seasnail, Liparis liparis
* Llyfrothen Benddu, Lipophrys pholis, Lipophrys pholis
* Cythraul Y Môr, Lophius piscatorius, Lophius piscatorius
* Penfras Dŵr Croyw, Burbot, Lota lota
* Llyfrothen Fain, snake blenny, Lumpenus lampretaeformis
* Caplan, Capelin, Mallotus villosus
* Morfil Cefngrwm, Humpback whale, Megaptera novaeangliae
* Gwyniad Môr, Merlangius, Merlangius merlangus
* Morfil Gylfinog Sowerby, Sowerby's beaked whale, Mesoplodon bidens
* Morfil Gylfinog True, True's beaked whale, Mesoplodon mirus
* Swtan Glas, Blue whiting, Micromesistius poutassou
* Lleden Lefn, Lemon sole, Microstomus kitt
* Pysgodyn Haul, Ocean sunfish, Mola mola
* Honos Glas, Blue ling, Molva dypterygia
* Morfil Uncorn, Narwhal, Monodon monoceros
* Morgi Llyfn, Starry smooth-hound, Mustelus asterias
* Morgi Serennog, Common smooth-hound, Mustelus mustelus
* Sgorpion Môr Pedwar-Corn, Fourhorn sculpin, Myoxocephalus quadricornis
* Safngrwn, Myxine glutinosa, Myxine glutinosa
* Pibell Fôr Leiaf, Worm pipefish, Nerophis lumbriciformis
* Pibell Fôr Drwynsyth, Straightnose pipefish, Nerophis ophidion
* Eog Cefngrwm, Pink salmon, Oncorhynchus gorbuscha
* Bonito Unlliw, Orcynopsis unicolor, Orcynopsis unicolor
* Brwyniad Conwy, European smelt, Osmerus eperlanus
* Merfog Coch, Blackspot seabream, Pagellus bogaraveo
* Gwylan Ifori, Ivory Gull, Pagophila eburnea
* Twmpot, Tompot blenny, Parablennius gattorugine
* Lleden Wadn Y Tywod, Sand sole, Pegusa lascaris
* Morfil Pen Pwmpen, Melon-headed whale, Peponocephala electra
* "Draenogyn Dŵr Croyw(G), draenogiaid dŵr croyw", European perch
* Llysywen Bendoll Y Môr, Sea lamprey, Petromyzon marinus
* Llydandroed Llwyd, Red phalarope, Phalaropus fulicarius
* Llydandroed Gyddfgoch, Red-necked phalarope, Phalaropus lobatus
* Llydandroed Wilson, Wilson's Phalarope, Phalaropus tricolor
* Pibydd Torchog, Ruff, Philomachus pugnax
* Morlo Cylchog, Ringed seal, Phoca hispida
* Morlo Cyffredin, Harbor seal, Phoca vitulina
* Llamhidydd, Harbour porpoise, Phocoena phocoena
* Lleden Benglwm Norwy, Norwegian topknot, Phrynorhombus norvegicus
* Lleden Benglwm Eckstrom, , Phrynorhombus regius
* Morfil Sberm, Sperm whale, Physeter macrocephalus
* Lleden Fwd, European flounder, Platichthys flesus
* Lleden Goch, European plaice, Pleuronectes platessa
* Corgwtiad Aur, American golden plover, Pluvialis dominica
* Chwitlyn Glas, Pollachius virens, Pollachius virens
* Pysgodyn Broc Môr, Atlantic wreckfish, Polyprion americanus
* Gobi'r Tywod, Sand goby, Pomatoschistus minutus
* Gobi Lliwgar, Painted goby, Pomatoschistus pictus
* Rhegen Fraith, Spotted crake, Porzana porzana
* Morgi Glas, Blue shark, Prionace glauca
* Merfog Arian, silver pomfret, Pterycombus brama
* Crothell Naw Pigyn, Ninespine stickleback, Pungitius pungitius
* Morgath Wen, white skate, Raja alba
* Morgath (Neu Cath Fôr), Common skate, Raja batis
* Morgath Drwynbwl, cownose ray, Raja bonasus
* Morgath Styds, Thornback ray, Raja clavata
* Morgath Gribog, shagreen ray, Raja fullonica
* Morgath Lygaid-Bach, Smalleyed ray, Raja microocellata
* Morgath Bigog, Thorny skate, Raja radiata
* Morgath Donnog, Undulate ray, Raja undulata
* Rhegen Ddŵr, Water Rail, Rallus aquaticus
* Pysgodyn Haul Main, Slender sunfish, Ranzania laevis
* Gwylan Goesddu, Black-legged Kittiwake, Rissa tridactyla
* Brithyll Seithliw, Rainbow trout, Salmo gairdneri
* Brithyll Seithliw, Rainbow trout, Salmo gairdneri
* Siwin (Neu Gwyniedyn), Brown trout, Salmo trutta
* Torgoch Afon, Brook trout, Salvelinus fontinalis
* Pennog Mair, European pilchard, Sardina pilchardus
* Pysgodyn Rhudd, Common rudd, Scardinius erythrophthalmus
* Lleden Fannog, Brill (fish), Scophthalmus rhombus
* Pysgodyn Safnlas, Scorpaenidae, Scorpaenidae
* Morgi Brych, Nursehound, Scyliorhinus stellaris
* Pysgodyn Coch, Rose fish, Sebastes marinus
* Pysgodyn Coch Norwy, Norway haddock, Sebastes viviparus
* Lleden Chwithig, Common sole, Solea solea
* Morgi Pen Morthwyl, Smooth hammerhead, Sphyrna zygaena
* Crothell Bymtheg-Pigyn, Spinachia spinachia, Spinachia spinachia
* Merfog Du, Black seabream, Spondyliosoma cantharus
* Ci Pigog, Spiny dogfish, Squalus acanthias
* Dolffin Rhesog, striped dolphin, Stenella caeruleoalba
* Draenogyn Cegfawr, Zander, Stizostedion lucioperca
* Pibell Fôr Nilsson, Lesser pipefish, Syngnathus rostellatus
* Pibell Fôr Drwynllydan, Broadnosed pipefish, Syngnathus typhle
* Merfog Asgell-Hir, Big-scale pomfret, Taractichthys longipinnis
* Sgorpion Môr, Taurulus bubalis, Taurulus bubalis
* Sgorpion Môr Norwy, Norway bullhead, Taurulus lilljeborgi
* Gobi Mannog, Leopard-spotted goby, Thorogobius ephippiatus
* Tiwna Asgell-Hir, Albacore, Thunnus alalunga
* Tiwna Melyn, Yellowfin tuna, Thunnus albacares
* Cangen Las, Grayling (species), Thymallus thymallus
* Morgath Drydan Fraith, Marbled electric ray, Torpedo marmorata
* Morgath Drydan, Atlantic torpedo, Torpedo nobiliana
* Môr-Wiber Fawr, Greater weever, Trachinus draco
* Chwyrnwr Ysgithrog, Piper gurnard, Trigla lyra
* Chwyrnwr Rhesog, Streaked gurnard, Trigloporus lastoviza
* Codyn Llwyd, Trisopterus luscus, Trisopterus luscus
* Dolffin Trwyn Potel, Common bottlenose dolphin, Tursiops truncatus
* Pysgodyn cleddyf, Swordfish, Xiphias gladius
* Pysgodyn Darn Arian, John Dory, Zeus faber
* Morfil Gylfinog Cuvier, Cuvier's beaked whale, Ziphius cavirostris
* Walrws, Walrus, Odobenus rosmarus

## Gweler hefyd

* Rhestr adar Cymru