At any stage, you can move up or down the Taxonomic hierachy of Antarctic/subantarctic species by clicking on any name. Lower level taxon counts are shown in [].
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| Kingdom | Animalia | |
| Phylum | Chordata | |
| Class | Actinopterygii | |
| Order | Perciformes | |
| Family | Nototheniidae | |
| Genus | Trematomus |
List of Individual Species - see Taxon profile using the name of the taxa.
| Trematomus bernacchii | Boulenger, 1902 | Emerald notothen | |
| Trematomus centronotus | Regan, 1914 | Sharp-spined notothen | Synonym |
| Trematomus eulepidotus | Regan, 1914 | Blunt scalyhead | |
| Trematomus hansoni | Boulenger, 1902 | Striped Rockcod | |
| Trematomus lepidorhinus | (Pappenheim, 1911) | Slender scalyhead | |
| Trematomus loennbergii | Regan, 1913 | Scaly rockcod | |
| Trematomus newnesi | Boulenger, 1902 | Dusky rockcod | |
| Trematomus nicolai | (Boulenger, 1902) | Spotted rockcod | |
| Trematomus pennellii | Regan, 1914 | Sharp-spined notothen | |
| Trematomus scotti | (Boulenger, 1907) | Crowned rockcod | |
| Trematomus sp. | Rockcod | ||
| Trematomus sp. | Trematomus spp | ||
| Trematomus tokarevi | Andriashev, 1978 | Bigeye notothen | |
| Trematomus tokarevi | Andriashev, 1978 | Bigeye rockcod | |
| Trematomus vicarius | Lönnberg, 1905 | Orange notothen |