| macdonaldi, Salmo mykiss (4) |
menona, Zygonectes diaphanus (1) |
| maciliense, Heterogramma trifasciatum (1) |
mento, Parexocoetus mento (2) |
| mackayi, Syngnathus mackayi (1) |
mentoides, Aphanius sophiae (1) |
| mackenziei, Stenodus leucichthys (2) |
mesaeum, Boleosoma nigrum (1) |
| macrocephalus, Mnierpes macrocephalus (1) |
metzi, Gibbonsia metzi (23) |
| macrochirus, Lepomis macrochirus (16) |
mexicanus, Astyanax fasciatus (8) |
| macrolepidotus, Pogonichthys macrolepidotus (3) |
mexicanus, Dormitator latifrons (2) |
| macronema, Pimelodus clarias (1) |
mexicanus, Malacoctenus margaritae (2) |
| macrophthalma, Rasbora dorsiocellata (1) |
mexicanus, Paraclinus mexicanus (27) |
| macrophthalmus, Astyanax fasciatus (2) |
michauxi, Campostoma anomalum (1) |
| macrospilus, Acanthemblemaria hancocki (3) |
micrescens, Astroblepus grixalvii (1) |
| macrostoma, Oncorhynchus rhodurus (9) |
microcephalus, Gasterosteus aculeatus (150) |
| maculatofasciatus, Paralabrax maculatofasciatus (7) |
microcephalus, Gasterosteus williamsoni (15) |
| maculatus, Helicolenus dactylopterus (1) |
microperca, Microperca microperca (1) |
| maculosa, Lota lota (2) |
micropterus, Oxyporhamphus micropterus (10) |
| maculosus, Gobiesox eugrammus (1) |
microspilus, Gobiesox papillifer (1) |
| magdalenae, Atherinops affinis (7) |
mindanensis, Dermogenys viviparus (1) |
| magdalenae, Hoplosternum thoracatum (2) |
mindi, Pseudophallus starksi (1) |
| magdalenensis, Exerpes asper (2) |
mineatus, Lepomis punctatus (1) |
| makaxi, Syngnathus scovelli (1) |
mionectes, Cyprinodon nevadensis (12) |
| malus, Doryrhamphus negrosensis (2) |
missuriensis, Notropis deliciosus (4) |
| manitou, Percina caprodes (3) |
missuriensis, Notropis stramineus (2) |
| marconis, Hybopsis aestivalis (3) |
mitrulus, Hesperoleucus symmetricus (1) |
| margaritae, Malacoctenus margaritae (3) |
mizolepis, Scopelogadus mizolepis (67) |
| marginatus, Conger cinereus (7) |
mjicrocephalus, Gasterosteus aculeatus (1) |
| marginatus, Conger conger (1) |
mniotiltus, Catostomus occidentalis (20) |
| marisrubri, Macropharyngodon bipartitus (1) |
mohavensis HYBRID, Gila bicolor (1) |
| marisrubri, Pempheris flavicycla (2) |
mollispinis, Lepidomeda mollispinis (3) |
| marmoratus, Scorpaenichthys marmoratus (1) |
monroviae, Epiplatys dageti (1) |
| marmoratus, Ameiurus nebulosus (1) |
montereyensis, Gibbonsia elegans (7) |
| marmoratus, Ictalurus nebulosus (1) |
montereyensis, Gibbonsia montereyensis (8) |
| mauretanicus, Chilomycterus spinosus (1) |
monteryensis, Gibbonsia elegans (2) |
| maxillosus, Belonesox belizanus (1) |
mordax, Engraulis mordax (20) |
| medirastre, Opisthonema medirastre (1) |
moretonensis, Callionymus kaianus (4) |
| meerdervoorti, Raja porosa (8) |
morph A, Bathyraja trachura (2) |
| melanochir, Polynemus melanochir (1) |
morph B, Bathyraja trachura (8) |
| melanops, Sebastes melanops (3) |
mossaro, Cynolebias antenori (1) |
| melanotus, Tylosurus acus (5) |
multiannulatus, Dunckerocampus dactylopterus (1) |
| melas, Ameiurus melas (5) |
multipunctatus, Malacoctenus afuerae (6) |
| melas, Ictalurus melas (5) |
mundeoloides, Anchoa mundeoloides (1) |
| meleagris, Rhinichthys atratulus (1) |
muticellus, Leuciscus souffia (1) |
| menona, Fundulus diaphanus (4) |
mystes, Scorpaena plumieri (24) |