| abbreviatus, Doryrhamphus excisus (1) |
antipai, Gobio kessleri (4) |
| aberrans, Hypoplectrus unicolor (1) |
apache, Oncorhynchus gilae (7) |
| aculeata, Capoeta capoeta (1) |
apna, Mycteroperca venenosa (1) |
| aculeatus, Gasterosteus aculeatus (36) |
apristis, Hadropterus scierus (1) |
| aculeatus, Microphis brachyurus (5) |
apua, Mycteroperca venenosa (1) |
| aculeatus HYBRID, Gasterosteus aculeatus (3) |
apuda, Mycteroperca venenosa (1) |
| aculestus, Gasterosteus aculeatus (1) |
aquilerium, Salmo gairdnerii (1) |
| acus, Tylosurus acus (1) |
araea, Atherina harringtonensis (1) |
| acuticeps, Poropuntius bolovenensis (1) |
arcansanus, Notropis telescopus (2) |
| acutus, Fodiator acutus (1) |
arcausanus, Notropis telescopus (1) |
| acutus, Hyporhamphus acutus (28) |
arcensanus, Poecilichthys zonalis (1) |
| acutus, Notropis atherinoides (1) |
archolepis, Anoplarchus cristagalli (1) |
| adobe, Rhinichthys osculus (1) |
archolepis, Anoplarchus purpurescens (21) |
| aeger, Hymenocephalus striatissimus (1) |
arcuarium, Diplectrum radiale (1) |
| aeneus, Corydoras aeneus (1) |
ardesiaca, Lavinia exilicauda (4) |
| aeneus, Astyanax fasciatus (13) |
ardeus, Notropis umbratilis (1) |
| affinis, Atherinops affinis (77) |
arenatus, Entomacrodus striatus (1) |
| affinis, Gambusia affinis (53) |
arenicola, Anchoa eigenmannia (1) |
| affinis, Cymatogaster aggregata (1) |
argalus, Platybelone argalus (2) |
| affinis, Ictalurus furcatus (1) |
aries, Archosargus probatocephalus (1) |
| affinis x littoralis, Atherinops affinis (1) |
armatus, Leptocottus armatus (159) |
| africana, Coris gaimard (1) |
armatus, Apodichthys flavidus (1) |
| africanus, Bothus podas (1) |
armatus, Lepidogobius lepidus (1) |
| afuerae, Malacoctenus afuerae (1) |
arrigonis, Chondrostoma toxostoma (1) |
| agassiz, Mugil brasiliensis (1) |
artifrons, Cyprinodon variegatus (1) |
| aguabonita, Salmo aguabonita (2) |
asper, Exerpes asper (4) |
| aguabonita, Salmo irideus (2) |
atherinoides, Notropis atherinoides (2) |
| aguabonita, Oncorhynchus mykiss (17) |
atlantica, Magnisudis atlantica (3) |
| aguabonita, Salmo mykiss (3) |
atomos, Nezumia loricata (2) |
| aix, Pallasina barbata (6) |
atratulus, Rhinichthys atratulus (9) |
| alabamae, Etheostoma whipplei (1) |
atratulus (hybrid), Clinostomus funduloides x Rhinichthys (1) |
| alba, Cyclothone signata (1) |
atrimaculatus, Semotilus atromaculatus (1) |
| albeolus, Notropis cornutus (1) |
atrimentis, Menidia peninsulae (1) |
| albeolus, Notropis megalops (1) |
atriventer, Stomias boa (9) |
| albidum, Moxostoma congestus (5) |
atrocaudalis, Notropis cayuga (1) |
| albivallis, Crenichthys baileyi (1) |
atrodorsalis, Meiacanthus atrodorsalis (21) |
| alborella, Alburnus alburnus (1) |
atromaculatum, Boleosoma olmstedi (1) |
| albula, Mugil cephalus (1) |
atromaculatus, Semotilus atromaculatus (13) |
| alepidota, Chaenopsis alepidota (3) |
aurata, Sabanejewia aurata (1) |
| altivelis, Paraclinus altivelis (52) |
auratus, Carassius auratus (3) |
| altivelis, Trachipterus trachypterus (1) |
auratus, Notemigonus crysoleucas (1) |
| amargosae, Cyprinodon nevadensis (2) |
aureus, Brevoortia tyrannus (1) |
| amarus, Rhodeus sericeus (1) |
auroguttatus, Paralabrax maculatofasciatus (8) |
| amblops, Hybopsis amblops (1) |
australe, Curimatella alburnus (1) |
| americana, Epinnula orientalis (1) |
australe, Pimelodella laticeps (1) |
| ammulatis, Spheroides politus (1) |
australiae, Argentina elongata (3) |
| analis, Clinocottus analis (10) |
australis, Clinocottus analis (66) |
| analis, Umbrina analis (1) |
australis, Leptocottus armatus (16) |
| and N. platypogon, Netuma mazatlana (1) |
australis, Notemigonus crysoleucas (1) |
| anguillicaudatus, Misgurnus anguillicaudatus (1) |
australis, Tomicodon fasciatus (1) |
| annobonensis, Platybelone argalus (2) |
australis, Pimelodella laticeps (2) |
| anomalum, Campostoma anomalum (1) |
azumanus, Plectranthias kelloggi (1) |
| anomalus, Caulolatilus princeps (2) |
|