| saliens, Alticus saliens (4) |
speciosa, Gambusia affinis (1) |
| salmoides, Micropterus salmoides (13) |
spectabile, Etheostoma caeruleum (2) |
| salmonorum, Trachipterus rex (3) |
spectabile, Etheostoma coeruleum (1) |
| saludamus, Notropis hudsonius (1) |
spilotum, Etheostoma nianguae (1) |
| saludanus, Notropis hudsonius (1) |
spilurus, Salmo mykiss (4) |
| sanctaehelenae, Decapterus punctatus (19) |
spix, Triportheus angulatus (6) |
| sandvicensis, Acanthurus triostegus (5) |
steinitzi, Photoblepharon palpebratus (1) |
| sannio, Ichthyscopus lebeck (1) |
stenosomus, Icelus uncinalis (1) |
| santanderensis, Astroblepus cyclopus (6) |
stercusmuscarum, Craterocephalus stercusmuscarum (1) |
| sardina, Sardina pilchardus (1) |
stomias, Oncorhynchus clarki (8) |
| saurus, Oligoplites saurus (10) |
stomias, Salmo mykiss (6) |
| saxicola, Gymnothorax ocellatus (1) |
stonei, Salmo gairdneri (1) |
| scitulus, Prionotus scitulus (2) |
stonei, Salmo gairdnerii (2) |
| sebago, Salmo salar (1) |
stramineus, Notropis deliciosus (3) |
| see below, Gasterosteus aculeatus (1) |
striatissimus, Hymenocephalus striatissimus (1) |
| seleniris, Oncorhynchus clarki (11) |
striatus, Entomacrodus striatus (5) |
| seleniris, Salmo clarki (1) |
strigatus, Gobiodon quinque (1) |
| semicrenatus, Alticus semicrenatus (1) |
subclitus, Hesperoleucus symmetricus (1) |
| semicscaber, Cottus bairdii (1) |
subdifus, Hesperoleucus symmetricus (1) |
| semifasciata, Percina caprodes (4) |
subditus, Hesperoleucus symmetricus (20) |
| semiscaber, Cottus bairdii (1) |
subditus HYBRID, Hesperoleucus symmetricus (1) |
| serrula, Hadropterus scierus (3) |
subsp., Salvelinus alpinus (2) |
| shasta, Salmo gairdneri (1) |
subsp., Lavinia exilicauda (8) |
| shasta, Salmo gairdnerii (9) |
subsp., Rhinichthys osculus (6) |
| shoshone, Cyprinodon nevadensis (7) |
subsp., Hesperoleucus symmetricus (6) |
| siamensis, Trichopsis pumilus (1) |
subsp., Hysterocarpus traskii (4) |
| sicculus, Labidesthes sicculus (1) |
sucetta, Erimyzon sucetta (2) |
| signifer, Thymallus arcticus (37) |
sucklii, Catostomus commersonii (1) |
| sinensis, Cobitis taenia (1) |
sucklii, Catostomus commersonnii (1) |
| sini, Paraclinus altivelis (4) |
sudensis, Malacoctenus zonifer (48) |
| sinuensis, Brycon moorei (1) |
surinamensis, Corydoras schwartzi (1) |
| smirnovi, Breviraja smirnovi (2) |
symmetricus, Hesperoleucus symmetricus (67) |
| snyderi, Gila bicolor (6) |
symmetricus x*, Hesperoleucus symmetricus (1) |
| soporator, Bathygobius soporator (2) |
syncheilus, Catostomus syncheilus (3) |