Ray-finned fishes finder
| Common name | Scientific name | Family | Order |
|---|---|---|---|
| Sydney Cardinalfish | Apogon limenus | Apogonidae | Perciformes |
| Sydney Scorpionfish | Scorpaenopsis insperatus | Scorpaenidae | Scorpaeniformes |
| Sydney's Pygmy Pipehorse | Idiotropiscis lumnitzeri | Syngnathidae | Gasterosteiformes |
| Tadpole Coffinfish | Chaunacops melanostomus | Chaunacidae | Lophiiformes |
| Tailor | Pomatomus saltatrix | Pomatomidae | Perciformes |
| Tailspot Lizardfish | Synodus jaculum | Synodontidae | Aulopiformes |
| Talbot's Demoiselle | Chrysiptera talboti | Pomacentridae | Perciformes |
| Tarwhine | Rhabdosargus sarba | Sparidae | Perciformes |
| Tasmanian Clingfish | Aspasmogaster tasmaniensis | Gobiesocidae | Perciformes |
| Tasselled Anglerfish | filamentosus Rhycherus | Antennariidae | Lophiiformes |
| Tasselled Leatherjacket | Chaetodermis penicilligera | Monacanthidae | Tetraodontiformes |
| Tasselsnout Flathead | Thysanophrys cirronasa | Platycephalidae | Scorpaeniformes |
| Teardrop Butterflyfish | Chaetodon unimaculatus | Chaetodontidae | Perciformes |
| Temperate Snaggletooth | Astronesthes psychrolutes | Stomiidae | Stomiiformes |
| Tessellate Moray | Gymnothorax favagineus | Muraenidae | Anguilliformes |
| Theodore's Threadfin Bream | Nemipterus theodorei | Nemipteridae | Perciformes |
| Thetis Fish | Neosebastes thetidis | Neosebastidae | Scorpaeniformes |
| Thicklip Trevally | Carangoides orthogrammus | Carangidae | |
| Thinspine Grouper | Gracila albomarginata | Serranidae | |
| Thornback Cowfish | Lactoria fornasini | Ostraciidae | Tetraodontiformes |
| Thorny Tinselfish | Grammicolepis brachiusculus | Grammicolepididae | Zeiformes |
| Threadfin Butterflyfish | Chaetodon auriga | Chaetodontidae | Perciformes |
| Threadfin Leatherjacket | Paramonacanthus filicauda | Monacanthidae | Tetraodontiformes |
| Threadfin Pearl Perch | Glaucosoma magnificum | Glaucosomatidae | Perciformes |
| Threebar Porcupinefish | Dicotylichthys punctulatus | Diodontidae | Tetraodontidae |
| Three-spot Angelfish | Apolemichthys trimaculatus | Pomacanthidae | |
| Threespot Damsel | Pomacentrus tripunctatus | Pomacentridae | Perciformes |
| Threespot Humbug | Dascyllus trimaculatus | Pomacentridae | Perciformes |
| Threespot Wrasse | Halichoeres trimaculatus | Labridae | Perciformes |