| Scientific name | Taxa authority | English name | Origin | Country of occurrence | IUCN status | Image |
| Ordo: Petromyzontiformes |
| Family: Petromyzontidae |
| Eudontomyzon mariae | (Berg, 1931) | Ukrainian brook lamprey | Native |  Bulgaria,  Romania,  Russia,  Turkey,  Ukraine |  Least concern |  |
| Ordo: Rajiformes |
| Family: Rajidae |
| Raja clavata | Linnaeus, 1758 | Thornback ray | Native | Bulgaria,  Georgia, Romania, Russia, Turkey, Ukraine |  Near threatened |  |
| Ordo: Myliobatiformes |
| Family: Dasyatidae |
| Dasyatis pastinaca | Linnaeus, 1758 | Common stingray | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine |  Data deficient |  |
| Family: Gymnuridae |
| Gymnura altavela | (Linnaeus, 1758) | Spiny butterfly ray | Accidental | Turkey |  Vulnerable |  |
| Ordo: Carcharhiniformes |
| Family: Scyliorhinidae |
| Scyliorhinus canicula | (Linnaeus, 1758) | Small-spotted catshark | Accidental | Bulgaria, Turkey |  Not evaluated |  |
| Family: Sphyrnidae |
| Sphyrna zygaena | (Linnaeus, 1758) | Smooth hammerhead | Accidental | Bulgaria, Romania | Vulnerable |  |
| Ordo: Lamniformes |
| Family: Alopiidae |
| Alopias vulpinus | (Bonnaterre, 1788) | Common thresher | Accidental | Bulgaria, Turkey | Vulnerable |  |
| Ordo: Squaliformes |
| Family: Squalidae |
| Squalus acanthias | Linnaeus, 1758 | Spiny dogfish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Vulnerable |  |
| Squalus blainville | (Risso, 1827) | Longnose spurdog | Native | Bulgaria, Georgia, Turkey | Not evaluated |  |
| Ordo: Squatiniformes |
| Family: Squatinidae |
| Squatina squatina | Linnaeus, 1758 | Angelshark | Accidental | Bulgaria, Turkey |  Critically endangered |  |
| Ordo: Acipenseriformes |
| Family: Acipenseridae |
| Acipenser gueldenstaedtii | (Brandt & Ratzeburg, 1833) | Russian sturgeon | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Critically endangered |  |
| Acipenser nudiventris | Lovetsky, 1828 | Bastard sturgeon | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Critically endangered |  |
| Acipenser persicus | Borodin, 1897 | Persian sturgeon | Native | Bulgaria, Georgia | Critically endangered |  |
| Acipenser ruthenus | Linnaeus, 1758 | Sterlet | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Vulnerable |  |
| Acipenser stellatus | Pallas, 1771 | Starry sturgeon | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Critically endangered |  |
| Acipenser sturio | Linnaeus, 1758 | European sea sturgeon | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Critically endangered |  |
| Huso huso | Linnaeus, 1758 | Beluga | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Critically endangered |  |
| Ordo: Anguilliformes |
| Family: Anguillidae |
| Anguilla anguilla | Linnaeus, 1758 | European eel | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Critically endangered |  |
| Family: Congridae |
| Conger conger | Linnaeus, 1758 | European conger | Accidental | Bulgaria, Romania, Turkey, Ukraine | Not evaluated |  |
| Ordo: Clupeiformes |
| Family: Engraulidae |
| Engraulis encrasicolus | Linnaeus, 1758 | European anchovy | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Family: Clupeidae |
| Alosa caspia | (Eichwald, 1838) | Caspian shad | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Alosa fallax | Lacépède, 1800 | Twait shad | Native | Bulgaria, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Alosa immaculata | Bennett, 1835 | Pontic shad | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Vulnerable |  |
| Alosa maeotica | Grimm, 1901 | Black Sea shad | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Alosa tanaica | (Grimm, 1901) | Azov shad | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Clupeonella cultriventris | (Nordmann, 1840) | Black Sea sprat | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Sardina pilchardus | Walbaum, 1792 | European pilchard | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Sardinella aurita | Valenciennes, 1847 | Round sardinella | Accidental | Bulgaria, Georgia, Romania, Turkey, Ukraine | Not evaluated |  |
| Sprattus sprattus | (Linnaeus, 1758) | European sprat | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Ordo: Salmoniformes |
| Family: Salmonidae |
| Salmo labrax | Pallas, 1814 | Black Sea salmon | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Salmo trutta | Linnaeus, 1758 | Brown trout | Introduced species | Bulgaria, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Ordo: Gadiformes |
| Family: Gadidae |
| Merlangius merlangus | Linnaeus, 1758 | Whiting | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Micromesistius poutassou | (Risso, 1827) | Blue whiting | Accidental | Bulgaria, Ukraine | Not evaluated |  |
| Family: Lotidae |
| Gaidropsarus mediterraneus | (Linnaeus, 1758) | Shore rockling | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Family: Merlucciidae |
| Merluccius merluccius | (Linnaeus, 1758) | European hake | Native | Bulgaria, Georgia, Turkey | Not evaluated |  |
| Ordo: Ophidiiformes |
| Family: Ophidiidae |
| Ophidion rochei | Müller, 1845 | Roche's snake blenny | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Data deficient |  |
| Ordo: Lophiiformes |
| Family: Lophiidae |
| Lophius budegassa | (Spinola, 1807) | Blackbellied angler | Native | Bulgaria, Turkey | Not evaluated |  |
| Lophius piscatorius | Linnaeus, 1758 | Sea devil | Native | Bulgaria, Turkey, Ukraine | Not evaluated |  |
| Ordo: Atheriniformes |
| Family: Atherinidae |
| Atherina boyeri | Risso, 1810 | Big-scale sand smelt | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Atherina hepsetus | Linnaeus, 1758 | Mediterranean sand smelt | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Ordo: Beloniformes |
| Family: Belonidae |
| Belone belone | (Linnaeus, 1761) | Garfish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Ordo: Cyprinodontiformes |
| Family: Poeciliidae |
| Gambusia holbrooki | Girard, 1859 | Eastern mosquitofish | Introduced species | Bulgaria, Georgia, Turkey | Not evaluated |  |
| Ordo: Zeiformes |
| Family: Zeidae |
| Zeus faber | Linnaeus, 1758 | John Dory | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Ordo: Gasterosteiformes |
| Family: Gasterosteidae |
| Gasterosteus aculeatus | Linnaeus, 1758 | Three-spined stickleback | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Pungitius platygaster | (Kessler, 1859) | Ukrainian stickleback | Native | Bulgaria, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Ordo: Syngnathiformes |
| Family: Syngnathidae |
| Hippocampus guttulatus | (Cuvier, 1829) | Long-snouted seahorse | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Data deficient |  |
| Nerophis ophidion | (Linnaeus, 1758) | Straightnose pipefish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Syngnathus abaster | Risso, 1826 | Black-striped pipefish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Syngnathus acus | Linnaeus, 1758 | Greater pipefish | Accidental | Bulgaria, Turkey, Ukraine | Not evaluated |  |
| Syngnathus schmidti | Popov, 1927 | Black Sea pelagic pipefish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated | |
| Syngnathus tenuirostris | Rathke, 1837 | Narrow-snouted pipefish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Data deficient |  |
| Syngnathus typhle | Linnaeus, 1758 | Broadnosed pipefish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Syngnathus variegatus | Pallas, 1814 | Thickly snouted pipefish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated | |
| Ordo: Scorpaeniformes |
| Family: Scorpaenidae |
| Scorpaena notata | Rafinesque, 1810 | Small red scorpionfish | Native | Russia, Turkey | Not evaluated |  |
| Scorpaena porcus | Linnaeus, 1758 | Black scorpionfish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Family: Dactylopteridae |
| Dactylopterus volitans | Linnaeus, 1758 | Flying gurnard | Accidental | Bulgaria, Ukraine | Not evaluated |  |
| Family: Triglidae |
| Chelidonichthys cuculus | (Linnaeus, 1758) | Red gurnard | Accidental | Bulgaria, Turkey, Ukraine | Not evaluated |  |
| Chelidonichthys lucerna | (Linnaeus, 1758) | Tub gurnard | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Eutrigla gurnardus | (Linnaeus, 1758) | Grey gurnard | Accidental | Bulgaria, Turkey | Not evaluated |  |
| Ordo: Gobiesociformes |
| Family: Gobiesocidae |
| Apletodon dentatus | (Facciolà, 1887) | Small-headed clingfish | Native | Bulgaria, Romania | Not evaluated | |
| Diplecogaster bimaculata | (Bonnaterre, 1788) | Two-spotted clingfish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Lepadogaster candolii | Risso, 1810 | Connemarra clingfish | Native | Bulgaria, Georgia, Russia, Turkey, Ukraine | Not evaluated |  |
| Lepadogaster lepadogaster | (Bonnaterre, 1788) | Shore clingfish | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Ordo: Perciformes |
| Family: Blenniidae |
| Aidablennius sphynx | (Valenciennes, 1836) | Sphinx blenny | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Blennius ocellaris | Linnaeus, 1758 | Butterfly blenny | Native | Bulgaria, Turkey, Ukraine | Not evaluated |  |
| Coryphoblennius galerita | (Linnaeus, 1758) | Montagu's blenny | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Microlipophrys adriaticus | (Steindachner & Kolombatovic, 1883) | Adriatic blenny | Accidental | Bulgaria, Turkey, Ukraine | Data deficient |  |
| Parablennius gattorugine | (Linnaeus, 1758) | Tompot blenny | Native | Bulgaria, Turkey | Not evaluated |  |
| Parablennius incognitus | Bath, 1968 | Mystery blenny | Invasive | Bulgaria, Georgia, Turkey, Ukraine | Not evaluated |  |
| Parablennius sanguinolentus | (Pallas, 1814) | Rusty blenny | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Parablennius tentacularis | (Brünnich, 1768) | Tentacled blenny | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Parablennius zvonimiri | Kolombatovic, 1892 | Zvonimir's blenny | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Data deficient |  |
| Salaria pavo | (Risso, 1810) | Peacock blenny | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Family: Tripterygiidae |
| Tripterygion tripteronotus | (Risso, 1810) | Red-black triplefin | Native | Bulgaria, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Family: Callionymidae |
| Callionymus fasciatus | Valenciennes, 1837 | Banded dragonet | Native | Bulgaria, Russia, Turkey | Least concern | |
| Callionymus lyra | Linnaeus, 1758 | Common dragonet | Native | Bulgaria, Georgia, Russia, Turkey | Not evaluated |  |
| Callionymus pusillus | Delaroche, 1809 | Sailfin dragonet | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Callionymus risso | Le Sueur, 1814 | Risso's dragonet | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Family: Gobiidae |
| Aphia minuta | (Risso, 1810) | Transparent goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Babka gymnotrachelus | (Kessler, 1857) | Racer goby | Native | Bulgaria, Georgia, Romania, Turkey, Ukraine | Least concern |  |
| Benthophiloides brauneri | Beling & Iljin, 1927 | Beardless tadpole goby | Native | Bulgaria, Romania, Ukraine | Data deficient |  |
| Benthophilus nudus | Berg, 1898 | Black Sea tadpole-goby | Native | Bulgaria, Romania, Ukraine | Least concern |  |
| Caspiosoma caspium | (Kessler, 1877) | Caspiosoma | Native | Bulgaria, Ukraine | Least concern | |
| Chromogobius quadrivittatus | (Steindachner, 1863) | Chestnut goby | Native | Bulgaria, Russia, Turkey | Least concern |  |
| Gammogobius steinitzi | (Bath, 1971) | Steinitz's goby | Native | Bulgaria, Ukraine | Data deficient |  |
| Gobius bucchichi | Steindachner, 1870 | Bucchich's goby | Native | Bulgaria, Georgia, Russia, Turkey, Ukraine | Least concern |  |
| Gobius cobitis | Pallas, 1814 | Giant goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Gobius cruentatus | Gmelin, 1789 | Red-mouthed goby | Invasive | Bulgaria, Turkey, Ukraine | Not evaluated |  |
| Gobius niger | Linnaeus, 1758 | Black goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Gobius paganellus | Linnaeus, 1758 | Rock goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Gobius xanthocephalus | Heymer & Zander, 1992 | Yellow-headed goby | Native | Bulgaria, Georgia, Ukraine | Least concern |  |
| Knipowitschia cameliae | Nalbant & Otel, 1995 | Danube delta dwarf goby | Native | Bulgaria, Romania | Critically endangered | |
| Knipowitschia caucasica | (Berg, 1916) | Caucasian dwarf goby | Native | Bulgaria, Georgia, Romania, Turkey, Ukraine | Least concern |  |
| Knipowitschia longecaudata | (Berg, 1916) | Longtail dwarf goby | Native | Bulgaria, Romania, Ukraine | Least concern |  |
| Mesogobius batrachocephalus | (Pallas, 1814) | Toad goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Millerigobius macrocephalus | (Kolombatovic, 1891) | Large-headed goby | Invasive | Bulgaria, Ukraine | Not evaluated |  |
| Neogobius fluviatilis | (Pallas, 1814) | Monkey goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Neogobius melanostomus | (Pallas, 1814) | Round goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Pomatoschistus bathi | (Miller, 1982) | Bath's goby | Invasive | Bulgaria, Georgia, Russia, Ukraine | Not evaluated |  |
| Pomatoschistus marmoratus | (Risso, 1810) | Marbled goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Pomatoschistus minutus | (Pallas, 1770) | Sand goby | Native | Bulgaria, Romania, Turkey, Ukraine | Not evaluated |  |
| Pomatoschistus pictus | Malm, 1865 | Painted goby | Accidental | Bulgaria, Turkey, Ukraine | Not evaluated |  |
| Ponticola cephalargoides | (Pinchuk, 1976) | Pinchuk's goby | Native | Bulgaria, Romania, Ukraine | Not evaluated |  |
| Ponticola eurycephalus | (Kessler, 1874) | Mushroom goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Ponticola kessleri | (Günther, 1861) | Bighead goby | Native | Bulgaria, Romania, Turkey, Ukraine | Least concern |  |
| Ponticola platyrostris | (Pallas, 1814) | Flatsnout goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Ponticola ratan | (Nordmann, 1840) | Ratan goby | Native | Bulgaria, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Ponticola syrman | (Nordmann, 1840) | Syrman goby | Native | Bulgaria, Romania, Russia, Ukraine | Least concern |  |
| Proterorhinus marmoratus | (Pallas, 1814) | Marine tubenose goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Tridentiger trigonocephalus | (Gill, 1859) | Chameleon goby | Invasive | Bulgaria, Ukraine | Not evaluated |  |
| Zebrus zebrus | (Risso, 1827) | Zebra goby | Accidental | Turkey | Least concern |  |
| Zosterisessor ophiocephalus | (Pallas, 1814) | Grass goby | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Data deficient |  |
| Family: Labridae |
| Coris julis | (Linnaeus, 1758) | Mediterranean rainbow wrasse | Native | Bulgaria, Romania, Turkey | Least concern |  |
| Ctenolabrus rupestris | (Linnaeus, 1758) | Goldsinny wrasse | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Not evaluated |  |
| Labrus bergylta | Linnaeus, 1758 | Ballan wrasse | Native | Bulgaria, Turkey | Least concern |  |
| Labrus merula | Linnaeus, 1758 | Brown wrasse | Native | Bulgaria, Turkey | Least concern |  |
| Labrus viridis | Linnaeus, 1758 | Green wrasse | Native | Bulgaria, Romania, Turkey, Ukraine | Vulnerable |  |
| Symphodus cinereus | (Bonnaterre, 1788) | Grey wrasse | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Symphodus ocellatus | Forsskål, 1775 | Ocellated wrasse | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Symphodus roissali | (Risso, 1810) | Five-spotted wrasse | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Symphodus rostratus | (Bloch, 1791) | Pointed-snout wrasse | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Symphodus tinca | (Linnaeus, 1758) | East Atlantic peacock wrasse | Native | Bulgaria, Georgia, Romania, Russia, Turkey, Ukraine | Least concern |  |
| Family: Pomacentridae |
| Chromis chromis | (
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