Lophaster gaini Koehler 1912

are preyed upon by

• Global Biotic Interactions: Labidiaster annulatus Sladen 1889
• Global Biotic Interactions: Glyptonotus antarcticus Eights 1852
• Global Biotic Interactions: Heteronemertes longifissus (Hubrecht 1887)
• Global Biotic Interactions: Baseodiscus antarcticus Baylis 1915
• Global Biotic Interactions: Odontaster validus Koehler 1906

prey on

• Global Biotic Interactions: Propeleda longicaudata (Thiele 1912)
• Global Biotic Interactions: Laternula elliptica (P. P. King 1832)
• Global Biotic Interactions: Limopsis lillei
• Global Biotic Interactions: Lissarca notorcadensis Melvill & Standen 1907
• Global Biotic Interactions: Adamussium colbecki (E. A. Smith 1902)