Monotypic marine fish genera

Merlangius merlangus, commonly known as whiting or merling, is an important food fish in the eastern North Atlantic Ocean and the northern Mediterranean, western Baltic, and Black Sea. In Anglophonic countries outside the whiting's natural range, the name "whiting" has been applied to various other species of fish.

Paracanthurus hepatus is a species of Indo-Pacific surgeonfish. A popular fish in marine aquaria, it is the only member of the genus Paracanthurus.

Konosirus punctatus is a species of fish in the family Dorosomatidae. It is the only member of the monotypic genus Konosirus. Its common names include dotted gizzard shad and konoshiro gizzard shad. It is native to the northwestern Pacific Ocean, where it occurs along the Asian coastline.

thumb|right|240px|Haplophryne mollis female anglerfish with atrophied males attached

Lophichthys boschmai, also known as Arafura frogfish or '''Boschma's frogfish', is a species of anglerfishes closely related to frogfish. L. boschmai is the only species in the Lophichthyidae family. L. boschmai'' were first reported by Marinus Boseman in 1964 to the Rijksmuseum van Natuurlijke Historie, now known as National Museum of Natural History in Leiden. The species was named after Dutch zoologist, Hildbrand Boschma.

Archamia bleekeri, also known as '''Gon's cardinalfish, is a species of fish in the family Apogonidae, the cardinalfishes. It is native to the coastal waters of the Indian Ocean and the western Pacific Ocean from Africa to Indonesia and from Taiwan to Queensland, Australia. This species occurs in mangrove forests and reefs, and is an inhabitant of shipwrecks, preferring silty areas with muddy or sandy substrates. This species grows to a total length of . This species is the only member of the genus Archamia'. The other species were moved to the new genus Taeniamia'' in 2013.

Arctogadus glacialis, known also with ambiguous common names Arctic cod and polar cod, is an Arctic species of fish in the cod family Gadidae, related to the true cod (genus Gadus). Arctogadus glacialis is found in icy water. They grow to about 30 cm long, and are favorite food of narwhals and other arctic whales.

Tetrabrachium ocellatum (four-armed frogfish) is a species of anglerfish, closely related to the true frogfishes. It is the only member of its genus.

Phosichthys argenteus, the silver lightfish, a species of lightfish and the only member of the genus Phosichthys, is found in deep subtropical waters of all oceans, from depths of 500 to 2,000 m. Its length is between 10 and 30 cm. They are bioluminescent fishes, possessing rows of photophores along their sides, with which they hunt planktonic invertebrates, especially krill.

REDIRECT Deepwater burrfish

Barnardichthys fulvomarginata, the lemon sole, is a species of sole endemic to the coasts of South Africa. This species is the only known member of its genus.

Litobranchus fowleri, '''Fowler's rockskipper''', is a species of combtooth blenny found in coral reefs in the western Pacific ocean. It can reach a maximum length of SL. This species is currently the only species in its genus. The specific name hours the American ichthyologist Henry Weed Fowler (1878-1965).

Cheimerius is a monospecific genus of marine ray-finned fish belonging to the family Sparidae, the seabreams and porgies. The only species in the genus is Cheimerius nufar, the santer seabream, santer or soldier, of the Indian Ocean.

Bovitrigla is a monotypic genus of marine ray-finned fishes belonging to the family Triglidae, the gurnards and sea robins, one of two genera belonging to the subfamily Pterygotriglinae. Its only species, Bovitrigla acanthomoplate, is found in the western Pacific Ocean.

Adelosebastes is a monotypic genus of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. The only species in this genus is Adelosebastes latens, the Aleutian scorpionfish. It is found in the northern Pacific Ocean.

Dicotylichthys punctulatus, also known as the three-bar porcupinefish, is a species of porcupinefish endemic to the east coast of Australia, where it is found in coastal and offshore reef environments down to deep. This species grows to in standard length, although most only reach . This species is the only known member of the genus Dicotylichthys.

The blacknosed butterflyfish or barberfish (Johnrandallia nigrirostris) (from the Spanish names, El Barbero or Mariposa Barbero, "the barber" or "butterfly barber"), is a species of fish in the family Chaetodontidae, the butterfly fishes. It is found in the East Pacific, specifically around the Galápagos Islands and in the Sea of Cortez, and it sometimes acts as a cleaner fish. It is the only member of the genus Johnrandallia, named after the ichthyologist John E. Randall, but in the past it was commonly placed in Chaetodon.

REDIRECT Black-spotted parrotfish

REDIRECT Green humphead parrotfish

Cyclopterus is a genus of marine ray-finned fish belonging to the family Cyclopteridae, the lumpsuckers or lumpfish. Its only species is Cyclopterus lumpus, the lumpsucker or lumpfish. It is found in the North Atlantic and adjacent parts of the Arctic Ocean, ranging as far south as the Chesapeake Bay (rare south of New Jersey) on the North American coast and Spain (rare south of the English Channel) on the European coast. The species has been reported twice in the Mediterranean Sea, off Croatia in 2004 and Cyprus in 2017.

Argyrocottus is a monospecific genus of marine ray-finned fish belonging to the family Cottidae, the typical sculpins. Its only species is Argyrocottus zanderi which is found in the northwestern Pacific Ocean from Japan to the Kuril Islands and in the Sea of Japan. It is found at depths of from . This species grows to a standard length of . This taxon was first formally described in 1892 by the Russian zoologist Solomon Herzenstein with its type locality given as Korsakov on Sakhalin in the Sea of Okhotsk. The 5th edition of Fishes of the World classifies the genus Argyrocottus within the subf

Idiolychnus urolampus is a species of lanternfish known from the Pacific and Indian Oceans. This species grows to a length of SL.

Phyllophryne is a monospecific genus of marine ray-finned fish belonging to the subfamily Histiophryninae in the family Antennariidae, the frogfishes. The only species in the genus is Phyllophryne scortea, the white-spotted anglerfish, smooth anglerfish or smooth frogfish, which is endemic to southern Australia.

REDIRECT Natal wrasse

REDIRECT Finspot wrasse

REDIRECT Sand wrasse

thumb | right Lophodiodon calori, also known as the four-bar porcupinefish, is a species of porcupinefish native to the Indo-Pacific where it is found in environments with a substrate composed of rubble and sand at depths of at most , often above the continental shelf. Although adults of the species are benthic in nature, juveniles are pelagic. It feeds on hard-shelled invertebrates and is noted to be an uncommon species. The species grows to a length of SL and is the only known member of its genus.

Lampichthys procerus, the blackhead lanternfish, is a species of lanternfish found circumglobally in the southern oceans. This fish grows to a length of TL.

Notolychnus valdiviae, the topside lanternfish, is a species of lanternfish found in the oceans worldwide. This species grows to a length of TL.

REDIRECT Andriyashev largeheaded sculpin

Alloclinus is a genus of blennies in the family Labrisomidae. It is monotypic, being represented by the single species, Alloclinus holderi, commonly known as the island kelpfish. Alloclinus holderi is a subtropical species native to the eastern Pacific Ocean from Santa Cruz Island, California, to Baja California. This species inhabits rocky areas and can be found down to about . It can reach a length of . The specific name honours the American naturalist, conservationist and author Charles Frederick Holder (1851-1915).

thumb|upright=2|Goblinfish Glyptauchen panduratus (Richardson 1850), from lateral and head from dorsal

Aspasmodes briggsi is a species of clingfish native to the Seychelles. This species grows to a length of SL. This species is the only known member of its genus. This species was described by J.L.B. Smith in 1957 from a type collected at La Digue, Seychelles. The specific name honours the author of a 1955 monograph on the clingfishes, the American ichthyologist John "Jack" C. Briggs (1920-2018) of the University of Florida.

Haptogenys bipunctata is a species of combtooth blenny found in the western Pacific and Indian Oceans. It is the only known member of its genus.

Chaetodermis penicilligerus, also known as the prickly leather-jacket, tasselled leather-jacket or leafy filefish, is a demersal marine fish belonging to the family Monacanthidae. This fish is in the monotypic genus Chaetodermis. It occasionally makes its way into the marine aquarium fish trade.

Pseudotriacanthus is a monospecific genus of marine ray-finned fish belonging to the family Triacanthidae, the triplespines or tripodfishes. The only species in this genus is Pseudotriacanthus strigilifer, the longspined tripodfish. This taxon is found in the Indo-West Pacific region.

REDIRECT Longtail skate

Capros, the boarfish or Zulu fish, is a monospecific genus of marine ray-finned fish belonging to the family Caproidae. Its only known species is Capros aper. The boarfish is found in the northeastern Atlantic Ocean and the Mediterranean.

Atopocottus is a monospecific genus of marine ray-finned fish belonging to the family Cottidae, the typical sculpins. Its only species is Atopocottus tribranchius which is found in the Sea of Japan where it is only known from the waters off of Niigata Prefecture. This species grows to SL.

Apistus is a monotypic genus of marine ray-finned fish belonging to the subfamily Apistinae, the wasp scorpionfishes, part of the family Scorpaenidae, the scorpionfishes and their relatives. Its only species is the Apistus carinatus, which has the common names ocellated waspfish, bearded waspfish, longfin waspfish or ringtailed cardinalfish. It has a wide Indo-Pacific distribution. This species has venom-bearing spines in its fins.

REDIRECT Razorback scabbardfish

Dinoperca is a genus in the family Dinopercidae (cavebasses). It contains the single species Dinoperca petersi, the lampfish, which is native to reefs of the western Indian Ocean, where it can be found down to depths of . It prefers to inhabit the spaces under ledges, as well as the mouths of caves. This species grows to in total length. It is of minor importance to local commercial fisheries, but is popular as a sport fish. The identity of the person honoured in the specific name is not stated but Day thanks "Professor Peters" for his assistance in identifying the type who was Director of the

Dolichosudis fuliginosa is a species of barracudina found in the Atlantic Ocean and Western Pacific Ocean at a depths of around . This species grows to a length of SL. This species is the only known member of its genus.

Aspasma minima is a species of clingfish found in the Pacific Ocean near the shores of southern Japan. This species grows to in standard length. This species is the only species in the monotypic genus Aspasma. This species was described in 1887 by the German zoologist and paleontologist Ludwig Heinrich Philipp Döderlein from a type collected at a depth of 100-150 fathoms in Sagami Bay, Japan.

REDIRECT Glauert's anglerfish

Richardsonichthys, is a monotypic genus of marine ray-finned fish belonging to the subfamily Tetraroginae, the waspfishes, which is classified as part of the family Scorpaenidae, the scorpionfishes and their relatives. The only species in the genus is the whiteface waspfish (Richardsonichthys leucogaster), also known as the whitebelly roguefish, rouge fish, Torres Strait soldier fish or '''Richardson's waspfish'''. This species is native to reefs of the Indian Ocean and the western Pacific Ocean.

Caprichthys is a monospecific genus of marine ray-finned fish belonging to the family Aracanidae, the deepwater boxfishes or temperate boxfishes. The only species in the genus is the rigid boxfish (Caprichthys gymnura), also known as the black-spotted boxfish or ornate pigmy boxfish which is endemic to southwestern Australia.

Nudiantennarius is a monospecific genus of marine ray-finned fish belonging to the family Antennariidae, the frogfishes. The only species in the genus is Nudiantennarius subteres, the deepwater frogfish. This fish is found in the Western Pacific Ocean.