Fish beginning with M
M - The body shape is superficially similar to the cyprinids, although it is distinguished by having the adipose fin of salmonids.
Maataa - The New Zealand torpedo, Torpedo fairchildi, is a species of electric ray of the family Torpedinidae found only around New Zealand, at depths of between 5 and 1,100 m.
Macedonia shad - The liparia or Macedonian shad is a species of fish in the Clupeidae family.
Madagascar lampeye - Pantanodon madagascariensis was a species of fish in the Poeciliidae family.
Madame X - The tawny nurse shark, Nebrius ferrugineus, is a species of nurse shark, family Ginglymostomatidae, and the only extant member of the genus Nebrius.
Madeiran sardinella - Madeiran Sardinella is a species of ray-finned fish in the genus Sardinella.
Magela hardyhead - The Magela hardyhead is a species of fish in the Atherinidae family.
Magpie fiddler ray - The flattened pectoral fin discs of fiddler rays are shorter and more rounded than that of other guitarfishes.
Magpie perch - The magpie perch or magpie morwong, Cheilodactylus nigripes, is a morwong of the genus Cheilodactylus, found off southern Australia and northern New Zealand from shallow depths to 250 m.
Mahanadi rita - Rita chrysea is a species of catfish of the family Bagridae.
Maid - The yellow stingray, Urobatis jamaicensis, is a species of stingray in the family Urolophidae.
Maiden ray - The length of its body and tail is generally slightly less than 1 meter and width is about half a meter.
Majestic angelfish - Blue-girdled angelfish, Pomacanthus navarchus is a marine angelfish from the Indo-Pacific ocean.
Malabar osteobrama - Osteobrama bakeri is a species of ray-finned fish in the genus Osteobrama.
Malabar pufferfish - Both sexes are primarily yellow with dark green to black iridescent patches on the flanks and dorsal surface, but as with other members of the genus, sexual dimorphism is apparent in mature fish, with males being more brightly coloured than females.
Malacoglanis gelatinosus - Malacoglanis gelatinosus is a species of catfish of the family Trichomycteridae, and the only species of the genus Malacoglanis.
Malagarasi sardine - The Malagarasi Sardine is a species of ray-finned fish in the Cyprinidae family.
Malapterurus melanochir - Malapterurus melanochir is a species of catfish of the family Malapteruridae known as the "electric catfish"
Malapterurus polli - Malapterurus polli is a species of catfish of the family Malapteruridae.
Malawi eyebiter - In the aquarium they usually prefer to swim out in the open unlike the more common "Mbuna".
Malawi gar - It is found in Malawi, Mozambique, and Tanzania.
Malawi spinyeel - The Malawi spinyeel is a species of fish in the Mastacembelidae family.
Maldive anemonefish - This clownfish is characterized by its rusty, orange color with a single white stripe running vertically just behind the eye.
Maltese ray - In 2010, Greenpeace International has added the maltese skate to its seafood red list.
Manalak - The Manalak is a species of ray-finned fish in the Cyprinidae family.
Mandarin dogfish - The mandarin dogfish, Cirrhigaleus barbifer, is a dogfish, a member of the family Squalidae in the order Squaliformes.
Mandarinfish - The mandarinfish or mandarin dragonet , is a small, brightly-colored member of the dragonet family, which is popular in the saltwater aquarium trade.
Maneater shark - The tiger shark, Galeocerdo cuvier is a species of requiem shark and the only member of the genus Galeocerdo.
Mangar - Mangar is a species of ray-finned fish in the genus Barbus.
Mango-tara - Bramble sharks have a long cylindrical body covered with large protruding denticles, no anal fin, two small dorsal fins placed far on the back just before the tail, and five pairs of gill slits.
Mangrove dragonet - Mangrove dragonet is a species of ray-finned fish in the genus Callionymus.
Mangrove snapper - Coloration of the Mangrove Jack ranges from burnt orange, to copper, to bronze and dark reddish-brown, depending on its age and environment.
Mangrove whipray - The mangrove whipray, Himantura granulata, is a species of stingray in the family Dasyatidae.
Manipur osteobrama - Osteobrama belangeri is a species of ray-finned fish in the genus Osteobrama.
Mantasucker - The white suckerfish or mantasucker, Remorina albescens, is a species of remora in the family Echeneidae, a group of elongate marine fish with adhesive discs for attaching to larger organisms.
Maori chief - The Maori chief is a large bottom-living fish not too dissimilar to the Maori cod.
Maori cod - Paranotothenia magellanica, the Maori cod, is also known as Magellanic rockcod, blue notothenia or orange throat notothen.
Maori trout - The giant kokopu, Galaxias argenteus, is a galaxiid of the genus Galaxias, found only in New Zealand.
Map puffer - It has an oval shape and the body is covered in small prickles.
Marakely - Paratilapia polleni is a medium sized cichlid fish from Madagascar.
Marble cichlid - The species was originally described by Louis Agassiz in 1831 as Lobotes ocellatus, as he mistakenly believed the species was marine, later work assigned the species to the genus Astronotus.
Marbled electric ray - The Gulf torpedo is the most widespread of the electric rays in the western Indian Ocean, with a patchy range extending to South Africa, Somalia, the Red Sea, the Arabian Sea, the Persian Gulf, Sri Lanka, and the Andaman Sea.
Marbled galaxias - These fish were originally designated as a single species, Galaxias olidus, despite:
Marbled headstander - The marbled headstander generally inhabits streams and rivers of the Orinoco and Amazon river systems.
Marbled lungfish - The marbled lungfish is smooth, elongated, and cylindrical with deeply embedded scales.
Marbled pearlfish - The ginger pearlfish is a species of fish in the Rivulidae family.
Marbled river cod - River blackfish are elongated with a rounded body, distinct snout and large mouth, and small to moderate sized eyes.
Marbled rockcod - The marbled rockcod, Notothenia rossii, is a marine cod icefish in the family Nototheniidae with distribution ranging from southern New Zealand to sub-Antarctic seas, on rocky reefs.
Marbled spiny eel - Tire track eel is a species of ray-finned, spiny eels belonging to the genus Mastacembelus
Marbled whipray - The marbled whipray, Himantura oxyrhyncha, is an extremely rare, little-known species of stingray in the family Dasyatidae, native to several freshwater rivers in Southeast Asia.
Marblefish - The marblefish or southern seacarp, Aplodactylus arctidens, is a marblefish of the genus Aplodactylus, found in south eastern Australia, and around New Zealand, in depths down to 40 m.
Margaret's dragonet - Margaret's dragonet is a species of ray-finned fish in the genus Callionymus.
Margined coralfish - Chelmon marginalis, commonly known as margined coralfish, is a species of tropical fish in the family Chaetodontidae.
Marico barb - The Marico Barb is a species of ray-finned fish in the Cyprinidae family.
Marmorated medaka - Oryzias marmoratus is a species of fish in the Adrianichthyidae family.
Marquesan grouper - The marquesan grouper is a species of fish in the Serranidae family.
Marquesan sardinella - Marquesan Sardinella is a species of ray-finned fish in the genus Sardinella.
Martenstyn's barb - Martenstyn's Barb is a species of ray-finned fish in the Cyprinidae family.
Mascota jumprock - Mascota Jumprock is a species of ray-finned fish in the genus Moxostoma.
Masked julie - The masked julie is a species of fish in the Cichlidae family.
Masked spinefoot - The body is yellow-orange dorsally grading through pale blue to white below.
Masked stingaree - The masked stingaree is a species of fish in the Urolophidae family.
Mastiglanis asopos - This species has a broad distribution, mainly throughout the left side tributaries of the Amazon basin and the Capim River basin in Brazil, as well as in the right tributaries of the Amazon basin in Brazil, Orinoco basin of Venezuela, and drainages in Guyana.
Matalote conchos - The Matalote Conchos can be found in China, northeast Siberia, North America.
Matano medaka - Oryzias matanensis is a species of fish in the Adrianichthyidae family.
Matthes' barb - Barbus acuticeps is a species of ray-finned fish in the Cyprinidae family.
Mauritius dragonet - Mauritius dragonet is a species of ray-finned fish in the genus Callionymus.
Maylandia aurora - Maylandia aurora is a species of fish in the Cichlidae family.
Mediterranean moray - The Mediterranean moray has an elongated, eel-like body and can reach a length of 1.
Mediterranean rockling - The Shore Rockling is often confused with the five-bearded rockling and also the larger three-bearded rockling , due to their similar colourings, shape and habitat.
Megalobrama elongata - Megalobrama elongata is a species of ray-finned fish in the genus Megalobrama.
Megalocentor echthrus - Megalocentor echthrus is a species of catfish of the family Trichomycteridae, and the only species of the genus Megalocentor.
Megamouth shark - The appearance of the megamouth is distinctive, but little else is known about it.
Megrim - The witch, Arnoglossus scapha, is a lefteye flounder of the family Bothidae, found around China and New Zealand, in waters less than 400 m in depth.
Mekong giant catfish - The Mekong giant catfish, Pangasianodon gigas, is a species of catfish in the shark catfish family , native to the Mekong basin in Southeast Asia.
Mekong stingray - The Mekong freshwater stingray was first recognized as a new species by Yasuhiko Taki, who included it as "Dasyatis sp.
Meo Viejo - The meo viejo is a species of fish in the Serranidae family.
Messinobarbus carottae - Earlier, some additional Mediterranean barbels have been included in Messinobarbus too.
Mexican Dace - Evarra eigenmanni is a species of ray-finned fish in the Cyprinidae family.
Mexican Dace - Evarra eigenmanni is an extinct species of ray-finned fish in the Cyprinidae family.
Mexican hornshark - The Mexican hornshark, Heterodontus mexicanus, is a bullhead shark of the family Heterodontidae.
Mexican mojarra - The Mayan cichlid reaches a maximum standard length of 280 mm .
Mexican stoneroller - The Mexican stoneroller has a very stout body with a very large head and snout.
Mexican tetra - Growing to a maximum overall length of 12 cm , the Mexican tetra is of typical characin shape, with unremarkable, drab coloration.
Midas cichlid - It is a rather distinct species, but most closely related to the Four-spotted Butterflyfish .
Midspot barb - Barbus stigmatopygus is a species of ray-finned fish in the genus Barbus.
Migigarei - The fish is named after Rikuzen Province, an old province of Japan.
Mikrogeophagus altispinosus - Mikrogeophagus altispinosus is a species of fish endemic to the Amazon river basin, in Brazil and Bolivia respectively.
Miller Lake lamprey - The Miller Lake lamprey is a species of fish in the Petromyzontidae family.
Millions fish - The guppy , also known as the millionfish is one of the most popular freshwater aquarium fish species in the world.
Mimic sandab - It is a demersal fish that lives in sandy or muddy bottoms of tropical waters, at depths of between 73 and 146 metres .
Mimic shiner - Mimic Shiner is a species of ray-finned fish in the genus Notropis.
Minnow-nase - The Minnow Nase is a species of ray-finned fish in the Cyprinidae family.
Mirror dory - The mirror dory has a high first dorsal fin containing 9 spiny rays, and about 27 soft rays in the second.
Mirror shiner - Mirror Shiner is a species of ray-finned fish in the genus Notropis.
Mirrorbelly - The 'mirrorbelly' or 'barreleye' is a barreleye of the genus Opisthoproctus, is found in most deep tropical and subtropical oceans and seas, from depths of 200 to 2,000 m.
Mirrorwing flyingfish - Mirrorwing flyingfish have 10-12 soft rays on their dorsal fins and 11-13 rays on their anal fins.
Misool rainbowfish - The Misool rainbowfish is a species of fish in the Melanotaeniidae family.
Mississippi paddlefish - Once common throughout the Midwest, overfishing and habitat changes have caused major population declines; both the meat and roe of the paddlefish are desirable as food.
Mitchell gudgeon - The Mitchell gudgeon is a species of fish in the Eleotridae family.
Mitotic stingaree - The blotched stingaree or mitotic stingaree is a species of fish in the Urolophidae family.
Miuroglanis platycephalus - Miuroglanis platycephalus is a species of catfish of the family Trichomycteridae, and the only species of the genus Miuroglanis.
Miyako tango - In the wild, it is found only on the Kantō Plain of Japan, an area near to the capital city of Tokyo.
Moapa dace - A small fish, with a maximum recorded length of 9 cm, its scales are small and embedded in the skin, resulting in a noticeably leathery texture .
Mochokiella paynei - Mochokiella paynei is the only species of catfish in the genus Mochokiella of the family Mochokidae.
Modoc sucker - The Modoc Sucker is a species of fish native to California.
Moga - The species was formerly the only representative of its genus, and is part of family Cichlidae in subfamily Cichlasomatinae.
Monarch cichlid - Physically similar to other members of the genus, especially P.
Mongolian redfin - Culter mongolicus is a species of ray-finned fish in the genus Culter.
Monkey goby - Because of the Rhine-Main-Danube Canal, Neogobius fluviatilis could expand his habitat.
Moonbeam gourami - Moonlight gourami is a labyrinth fish of the family Osphronemidae.
Moorish idol - It is said the moorish idol got its name from the Moors of Africa, who purportedly believe the fish to be a bringer of happiness.
Moose lake minnow - The body is elongate, usually 100 mm long, though some individuals twice that length have been found.
Morid cod - The slender codling or slender cod, Halargyreus johnsonii, is a morid cod, the only species in the genus Halargyreus.
Morid cod - The red codling or hoka, Pseudophycis bachus, is a morid cod of the genus Pseudophycis, found around southern Australia and New Zealand, from the surface to 700 m.
Mosaic gulper shark - The mosaic gulper shark has no anal fin, two dorsal fins with large spines, the second dorsal relatively high, almost as high as first, large eyes, angular extended free tips on the pectoral fins, and a moderately notched caudal fin.
Mosaic moray - The mosaic moray, Enchelycore ramosa, is a moray eel of the genus Enchelycore, found in south east Australia and around the offshore islands off Northland on the North Island of New Zealand at depths down to 100 metres, in reef areas of broken rock.
Mosaic skate - The Pavoraja mosaica is a species of fish in Rajidae family.
Mottled eagle ray - The mottled eagle ray is a species of fish in the Myliobatidae family.
Mottled moray - The Australian mottled moray , and mottled moray , Gymnothorax prionodon, is a moray eel of the family Muraenidae, found at depths down to 80 m.
Mottled twister - The mottled twister, Bellapiscis lesleyae, is a triplefin of the family Tripterygiidae, commonly found around the coast of New Zealand in rock pools and down to depths of about 5 m in reef areas of broken rock.
Mountain brook lamprey - The dorsal fin is notched but not separated from the disk, and when expanded, is always narrower than the head.
Mountain chub - The Mountain Chub is a species of ray-finned fish in the genus Algansea.
Mountain labeo - The Green Labeo or Mountain Labeo is a species of ray-finned fish in the Cyprinidae family.
Mouse catshark - The mouse catshark, Galeus murinus, is a cat shark of the family Scyliorhinidae found from Iceland and the Faroe Islands, at depths of between 475 and 1,200 m.
Mozambique tilapia - The Mozambique tilapia is laterally compressed, and has a deep body with long dorsal fins.
Mrigal carp - Mrigal is a species of ray-finned fish in the genus Cirrhinus.
Mud carp - Mud Carp is a species of ray-finned fish in the genus Cirrhinus.
Mud eel - The dorsal and anal fins of the brown mudfish are set well back before the caudal fin, nearly joining it.
Mud minnow - This species has a maximum length of 6 centimetres .
Mud minnow - The eastern mudminnow, Umbra pygmaea, is a freshwater fish of eastern North America, reaching a length of up to 15 cm.
Mud sunfish - The mud sunfish prefers sluggish, weedy waters of 10–22 °C , over muddy, detritus-strewn bottoms, and occurs in small lakes as well as riverine backwaters.
Muddy arrowtooth eel - The muddy arrowtooth eel, Ilyophis brunneus, is a cutthroat eel, the only species in the genus Ilyophis.
Mudminnow - The European mudminnow is a species of fish in the Umbridae family.
Muksun - The muksun is a widespread fish in the Siberian Arctic waters.
Mulatto conger - The Mottled Conger Moray, sometimes known as the Mulatto Conger, is a moray eel of the genus Enchelycore, distributed across the Atlantic and Pacific Oceans.
Mullet - The Striped Mullet is a mainly diurnal coastal species that often enters estuaries and rivers.
Multispine giant stingray - The multispine giant stingray, Dasyatis multispinosa is a species of stingray in the family Dasyatidae.
Mummichog - Mummichogs are typically found in muddy marshes, channels, and grass flats along coastal areas.
Munchkin skate - The munchkin skate is a species of fish in the Rajidae family.
Munk's devil ray - The manta de monk, Munk's devil ray, pygmy devil ray, or smoothtail mobula is a species of fish in the Mobulidae family.
Murray cod - The scientific name of Murray cod derives from an early Australian fish researcher with the surname McCulloch and the river from which the explorer Major Mitchell first scientifically described the species, the Peel River.
Murray jollytail - Flathead galaxias continue a pattern found in Murray-Darling native fish of speciation into upland and lowland habitats.
Muscat dragonet - Muscat dragonet is a species of ray-finned fish in the genus Callionymus.
Mustelus albipinnis - There are four other species of Mustelus in the eastern part of the Northern Pacific Ocean.
Mweru tilapia - Oreochromis mweruensis is a species of fish in the Cichlidae family.
Myaka - It is endemic to the Crater Lake Barombi Mbo, in western Cameroon.
Myxine australis - It is a harmless scaleless, eel-like animal with a pinkish body, a whitish head and a whitish mid dorsal stripe.