Trematomus loennbergii Regan 1913

are eaten by

• Global Biotic Interactions: Aptenodytes forsteri Gray & GR 1844 (keisaripingviini)
• Global Biotic Interactions: Dissostichus mawsoni Norman 1937
• Global Biotic Interactions: Dissostichus mawsoni Norman 1937
• Global Biotic Interactions: Leptonychotes weddellii (Lesson 1826) (Weddellinhylje)
• Global Biotic Interactions: Aptenodytes forsteri Gray & GR 1844 (keisaripingviini)

are parasitized by

• Global Biotic Interactions: Xystretrum moretonensis
• Global Biotic Interactions: Macvicaria georgiana (Kovaleva & Gaevskaya 1974) Zdzitowiecki & Pisano
• Global Biotic Interactions: Macvicaria microtestis Zdzitowiecki & Cielecka 1997
• Global Biotic Interactions: Helicometra antarcticae Holloway & Bier 1968
• Global Biotic Interactions: Helicometra rakusai Zdzitowiecki 1997

are preyed upon by

• Global Biotic Interactions: Dissostichus mawsoni Norman 1937
• Global Biotic Interactions: Trematomus loennbergii Regan 1913
• Global Biotic Interactions: Macrourus holotrachys Günther 1878
• Global Biotic Interactions: Ammothea carolinensis Leach 1814
• Global Biotic Interactions: Macrourus whitsoni (Regan 1913)

eat

• Global Biotic Interactions: Chorismus antarcticus (Pfeffer 1887)
• Global Biotic Interactions: Chorismus antarcticus (Pfeffer 1887)
• Global Biotic Interactions: Barrukia cristata (Willey 1902)

prey on

• Global Biotic Interactions: Trematomus loennbergii Regan 1913
• Global Biotic Interactions: Nematoflustra flagellata
• Global Biotic Interactions: Trematomus scotti (Boulenger 1907)
• Global Biotic Interactions: Isoschizoporella tricuspis (Calvet 1909)
• Global Biotic Interactions: Gymnodraco acuticeps Boulenger 1902