m'dess [Tunesia, Algeria, Morocco] – synonym of Monochirus hispidus
m'jecic [former Yugoslavia] – synonym of Crystallogobius linearis
M. Mediterraneo et ad Cornubiam'). – synonym of Mullus surmuletus
maanvis [Netherlands and Belgium] – synonym of Mola mola
macka [former Yugoslavia] – synonym of Scyliorhinus canicula
macka [former Yugoslavia] – synonym of Scyliorhinus stellaris
macka-padecka [former Yugoslavia] – synonym of Galeus melastomus
mackerel scad [UK and USA] – synonym of Decapterus macarellus
mackerel shark [UK and USA] – synonym of Isurus oxyrinchus
Macrurus (Mystaconurus) italicus: Günther, 1887: 13. – synonym of Hymenocephalus italicus
Madeira catshark [UK and USA] – synonym of Apristurus maderensis
Madeira ray [UK and USA] – synonym of Raja maderensis
madeira rock-fish [UK and USA] – synonym of Scorpaena maderensis
madeiran grenadier [UK and USA] – synonym of Coryphaenoides macrocephalus
madeiran sardinella [UK and USA] – synonym of Sardinella maderensis
madeiran smooth-head [UK and USA] – synonym of Rouleina maderensis
Maeruronus caninus: Marshall, 1966: 275. – synonym of Lyconus brachycolus
mafou [France and Belgium] – synonym of Rachycentron canadum
maigre commun [France and Belgium] – synonym of Argyrosomus regius
maigre [France and Belgium] – synonym of Argyrosomus regius
mailed sculpin [UK and USA] – synonym of Triglops murrayi
majoul [Tunesia, Algeria, Morocco] – synonym of Liza aurata
Makaire bécune [France and Belgium] – synonym of Tetrapturus pfluegeri
makaire blanc [France and Belgium] – synonym of Tetrapturus albidus
makaire bleu [France and Belgium] – synonym of Makaira nigricans
makreel [Netherlands and Belgium] – synonym of Scomber scombrus
makreelgeep [Netherlands and Belgium] – synonym of Scomberesox saurus
malabar grouper [UK and USA] – synonym of Epinephelus malabaricus
malarmat [France and Belgium] – synonym of Peristedion cataphractum
Maltese ray [UK and USA] – synonym of Raja melitensis
mange-sabon [former Yugoslavia] – synonym of Oedalechilus labeo
mantasucker [UK and USA] – synonym of Remorina albescens
Mante [France and Belgium] – synonym of Mobula mobular
maquereau commun [France and Belgium] – synonym of Scomber scombrus
maquereau espagnol [France and Belgium] – synonym of Scomber japonicus
maquereau espagnol [France and Belgium] – synonym of Scomber japonicus
maquereau [France and Belgium] – synonym of Scomber scombrus
marbled electric ray [UK and USA], – synonym of Torpedo marmorata
marbled goby [UK and USA] – synonym of Pomatoschistus marmoratus
marbled spinefoot [UK and USA] – synonym of Siganus rivulatus
marbré [France and Belgium] – synonym of Lithognathus mormyrus
marbré [France and Belgium] – synonym of Lithognathus mormyrus
marlin de Méditerranée [France and Belgium] – synonym of Tetrapturus belone
marlinsucker [UK and USA] – synonym of Remora osteochir
matulic barjaktat [former Yugoslavia] – synonym of Anthias anthias
matulic silioglavac [former Yugoslavia] – synonym of Callanthias ruber
matulic [former Yugoslavia] – synonym of Apogon imberbis
maul's searsid [UK and USA] – synonym of Maulisia mauli
mauritanian shortface eel [UK and USA] – synonym of Panturichthys mauretanicus
McAllister, 1963b: 55-58, fig. 3. – synonym of Triglops pingeli
MCZ no. 35779. – synonym of Stomias boa
mdass [Tunesia, Algeria, Morocco] – synonym of Solea vulgaris
meagre [UK and USA] – synonym of Argyrosomus regius
mediterranean bigeye rockling [UK and USA] – synonym of Antonogadus megalokynodon
mediterranean flagfin [UK and USA] – synonym of Aulopus filamentosus
mediterranean grenadier [UK and USA] – synonym of Chalinura mediterranea
mediterranean horse-mackerel [UK and USA] – synonym of Trachurus mediterraneus
mediterranean longsnout grenadier [UK and USA] – synonym of Trachyrhynchus trachyrhynchus
mediterranean moray [UK and USA] – synonym of Muraena helena
mediterranean painted goby [UK and USA] – synonym of Pomatoschistus pictus
mediterranean sand-eel [UK and USA] – synonym of Gymnammodytes cicerelus
mediterranean spearfish [UK and USA] – synonym of Tetrapturus belone
mediterranean spiderfish [UK and USA] – synonym of Bathypterois mediterraneus
Mediterraneo et Oceano septentrionali'). Holotype: LS no. 3. – synonym of Mullus barbatus
megrim [UK and USA] – synonym of Lepidorhombus whiffiagonis
melt [UK and USA] – synonym of Osmerus eperlanus
melva [France and Belgium] – synonym of Auxis rochei
mendola [Ar – synonym of Spicara maena
mendole [France and Belgium] – synonym of Spicara maena
menkous [Tunesia, Algeria, Morocco] – synonym of Lithognathus mormyrus
mennani abiad [Tunesia, Algeria, Morocco] – synonym of Epinephelus aeneus
mennani ahmar [Tunesia, Algeria, Morocco] – synonym of Epinephelus guaza
mennani [Tunesia, Algeria, Morocco] – synonym of Epinephelus alexandrinus
mennen [Tunesia, Algeria, Morocco] – synonym of Polyprion americanus
merlan argenté [France and Belgium] – synonym of Gadiculus argenteus
merlan [France and Belgium] – synonym of Merlangius merlangus
merlano [Itj – synonym of Merlangius merlangus
merle [France and Belgium] – synonym of Labrus merula
merlu blanc [France and Belgium] – synonym of Merluccius merluccius
merlu noir [France and Belgium] – synonym of Merluccius senegalensis
merlu [France and Belgium] – synonym of Merluccius merluccius
merluche blanche [France and Belgium] – synonym of Urophycis chuss
merluche-ecureuil [France and Belgium] – synonym of Urophycis tenuis
mérot gris [France and Belgium] – synonym of Polyprion americanus
merot [Tunesia, Algeria, Morocco] – synonym of Epinephelus guaza
mérou blanc [France and Belgium] – synonym of Epinephelus aeneus
mérou noir ou sombre [France and Belgium] – synonym of Epinephelus guaza
mérou noir [France and Belgium] – synonym of Epinephelus caninus
mérou royal [France and Belgium] – synonym of Mycteroperca rubra
mérou [France and Belgium] – synonym of Epinephelus guaza
merrett's grenadier [UK and USA] – synonym of Coelorhynchus abditilux
meskar [Tunesia, Algeria, Morocco] – synonym of Umbrina cirrosa
michael sars smooth-head [UK and USA] – synonym of Bellocia michaelsarsi
mihaca [former Yugoslavia] – synonym of Balistes carolinensis
Mihule ricni [former Chechoslovakia] – synonym of Lampetra fluviatilis
Milandre jaune [France and Belgium] – synonym of Paragaleus pectoralis
milandre [France and Belgium] – synonym of Galeorhinus galeus
Milk shark [UK and USA] – synonym of Rhizoprionodon acutus
miller's thumb [UK and USA] – synonym of Cottus gobio
milva [Tunesia, Algeria, Morocco] – synonym of Auxis rochei
minun [former Yugoslavia] – synonym of Engraulis encrasicholus
misella [Tunesia, Algeria, Morocco] – synonym of Belone belone
misella [Tunesia, Algeria, Morocco] – synonym of Belone svetovidovi
misic [former Yugoslavia] – synonym of Serranus hepatus
mlat [former Yugoslavia] – synonym of Sphyrna zygaena
mlijec [former Yugoslavia] – synonym of Aphia minuta
mniosa [Tunesia, Algeria, Morocco] – synonym of Mustelus asterias
modrak [former Yugoslavia] – synonym of Spicara maena
mol [former Yugoslavia] – synonym of Trisopterus minutus
monkey goby [UK and USA] – synonym of Neogobius fluviatilis
monrovian surgeonfish [UK and USA] – synonym of Acanthurus monroviae
montagu's blenny [UK and USA] – synonym of Coryphoblennius galerita
montagu's sea snail [UK and USA] – synonym of Liparis montagui
moonfish [UK and USA] – synonym of Lampris guttatus
moray [UK and USA] – synonym of Muraena helena
moro [France and Belgium] – synonym of Mora moro
morocco dentex [UK and USA] – synonym of Dentex maroccanus
morrude [France and Belgium] – synonym of Aspitrigla obscura
Morska mihule [former Chechoslovakia] – synonym of Petromyzon marinus
morski pas [former Yugoslavia] – synonym of Eugomphodus taurus
morski pas [former Yugoslavia] – synonym of Odontaspis ferox
morua [Tunesia, Algeria, Morocco] – synonym of Diplodus puntazzo
morue arctique [France and Belgium] – synonym of Eleginus navaga
morue du groenland [France and Belgium] – synonym of Arctogadus glacialis
morue polaire [France and Belgium] – synonym of Boreogadus saida
morue [France and Belgium] – synonym of Gadus morhua
moruna [former Yugoslavia] – synonym of Huso huso
mostelle à plumet [France and Belgium] – synonym of Lepidion lepidion
mostelle de fond [France and Belgium] – synonym of Phycis blennoides
mostelle de roche [France and Belgium] – synonym of Phycis phycis
motelle à cinq barbillons [France and Belgium] – synonym of Ciliata mustela
motelle à quatre barbillons [France and Belgium] – synonym of Rhinonemus cimbrius
motelle à trois barbillons [France and Belgium] – synonym of Antonogadus macrophthalmus
motelle à trois barbillons [France and Belgium] – synonym of Gaidropsarus mediterraneus
motelle commune [France and Belgium] – synonym of Gaidropsarus vulgaris
motelle de méditerranée [France and Belgium] – synonym of Gaidropsarus mediterraneus
motelle [France and Belgium] – synonym of Antonogadus megalokynodon
motelle [France and Belgium] – synonym of Gaidropsarus vulgaris
Mourine echancree [France and Belgium] – synonym of Rhinoptera marginata
Mourine [France and Belgium] – synonym of Pteromylaeus bovinus
mourjane [Tunesia, Algeria, Morocco] – synonym of Pagellus acarne
mourjane [Tunesia, Algeria, Morocco] – synonym of Pagellus erythrinus
Mouse catshark [UK and USA] – synonym of Galeus murinus
moustache sculpin [UK and USA] – synonym of Triglops murrayi
muddy arrowtooth eel [UK and USA] – synonym of Ilyophis brunneus
mul [Netherlands and Belgium] – synonym of Mullus surmuletus
mulet à grosse tête [France and Belgium] – synonym of Mugil cephalus
mulet cabot [France and Belgium] – synonym of Mugil cephalus
mulet doré [France and Belgium] – synonym of Liza aurata
mulet errant [France and Belgium] – synonym of Liza carinata
mulet labéon [former Yugoslavia] – synonym of Oedalechilus labeo
mulet labéon [France and Belgium] – synonym of Oedalechilus labeo
mulet lippu [France and Belgium] – synonym of Chelon labrosus
mulet porc [France and Belgium] – synonym of Liza ramada
mulet sauteur [France and Belgium] – synonym of Liza saliens
multipore searsid [UK and USA] – synonym of Normichthys operosus
murene brune [France and Belgium] – synonym of Gymnothorax unicolor
murene de madère [France and Belgium] – synonym of Gymnothorax maderensis
murene de mediterranée [France and Belgium] – synonym of Muraena helena
murene des Iles [France and Belgium] – synonym of Enchelycore anatina
murene jaune [France and Belgium] – synonym of Gymnothorax vicinus
murène [France and Belgium] – synonym of Muraena helena
murina [former Yugoslavia] – synonym of Muraena helena
Murray's Blackdevil – synonym of Melanocetus murrayi
murray's longsnout grenadier [UK and USA] – synonym of Trachyrhynchus murrayi
murray's smooth-head [UK and USA] – synonym of Conocara murrayi
müsaro [France and Belgium] – synonym of Liza ramada
müsaro [France and Belgium] – synonym of Mugil cephalus
müsaru durin [France and Belgium] – synonym of Liza aurata
müsaru [Fr – synonym of Liza saliens
müsaru [France and Belgium] – synonym of Chelon labrosus
Musso africain [France and Belgium] – synonym of Selene dorsalis
Myctophum (Lampanyctus) güntheri: Pappenheim, 1914: 196. – synonym of Lepidophanes guentheri
Myctophum (Myctophum) rarum forma integer Brauer, 1904, Zool. Anz., 28: 390. One presumable syntype: ZMHU no. 17585. – synonym of Loweina rara
Myctophum rarum: Albuquerque, 1954-1956: 347. – synonym of Loweina rara
Myxine à tête blanche [France and Belgium] – synonym of Myxine ios
myxine [France and Belgium] – synonym of Myxine glutinosa