Pseudorchomene rossi (Walker 1903)

are eaten by

• Global Biotic Interactions: Pagothenia borchgrevinki (Boulenger 1902) (Bald notothen)
• Global Biotic Interactions: Trematomus bernacchii Boulenger 1902 (Emerald rockcod)
• Global Biotic Interactions: Trematomus hansoni Boulenger 1902 (Striped notothen)
• Global Biotic Interactions: Trematomus pennellii Regan 1914 (Sharp-spined notothen)
• Global Biotic Interactions: Pygoscelis adeliae (Hombron & Jacquinot 1841) (Adelie Penguin)

are preyed upon by

• Global Biotic Interactions: Trematomus nicolai (Boulenger 1902) (Spotted notothen)
• Global Biotic Interactions: Harmothoe spinosa Kinberg 1856
• Global Biotic Interactions: Pachycara brachycephalum (Pappenheim 1912) (Shorthead eelpout)
• Global Biotic Interactions: Pogonophryne permitini Andriashev 1967 (Finespotted plunderfish)
• Global Biotic Interactions: Liljeborgia georgiana Schellenberg 1931

eat

• Global Biotic Interactions: Terebraria kerguelensis E. O'Meara 1876
• Global Biotic Interactions: Navicula glaciei
• Global Biotic Interactions: Fragilariopsis kerguelensis
• Global Biotic Interactions: Porosira pseudodenticulata
• Global Biotic Interactions: Dictyocha speculum

prey on

• Global Biotic Interactions: Corethron pennatum
• Global Biotic Interactions: Metridia gerlachei Giesbrecht 1902
• Global Biotic Interactions: Thysanoessa macrura G. O. Sars 1883
• Global Biotic Interactions: Eukrohnia hamata (Möbius 1875) (arrow worm)
• Global Biotic Interactions: Pseudosagitta gazellae (Ritter-Záhony 1909)