Trematomus is a genus of cod icefishes native to the Southern Ocean, with these currently recognized species: \n* Trematomus bernacchii Boulenger, 1902 (emerald rockcod) \n* Trematomus eulepidotus Regan, 1914 (blunt scalyhead) \n* Trematomus hansoni Boulenger, 1902 (striped rockcod) \n* Trematomus lepidorhinus (Pappenheim, 1911) (slender scalyhead) \n* Trematomus loennbergii Regan, 1913 (scaly rockcod) \n* Trematomus newnesi Boulenger, 1902 (dusky rockcod) \n* Trematomus nicolai (Boulenger, 1902) (spotted notothen) \n* Trematomus pennellii Regan, 1914 (sharp-spined notothenia) \n* Trematomus scotti (Boulenger, 1907) (crowned rockcod) \n* Trematomus tokarevi Andriashev, 1978 (bigeye notothen) \n* Trematomus vicarius Lönnberg, 1905 (orange notothen)