Tortanus discaudatus

are eaten by

• Global Biotic Interactions: Gadus chalcogrammus Pallas 1814 (Alaska pollock)
• Global Biotic Interactions: Pollachius virens (Linnaeus 1758) (saithe)
• Global Biotic Interactions: Hypomesus japonicus (Brevoort 1856) (Japanese smelt)

are preyed upon by

• Global Biotic Interactions: Rhincalanus nasutus Giesbrecht 1888
• Global Biotic Interactions: Scomber japonicus Houttuyn 1782 (Pacific Chub Mackerel)
• Global Biotic Interactions: Etheostoma olmstedi Storer 1842 (Tessellated Darter)
• Global Biotic Interactions: Clione limacina (Phipps 1774) (Sea Angel)
• Global Biotic Interactions: Membras martinica (Valenciennes 1835) (Rough Silverside)

prey on

• Global Biotic Interactions: Eurytemora affinis
• Global Biotic Interactions: Rhincalanus nasutus Giesbrecht 1888
• Global Biotic Interactions: Acanthocyclops vernalis
• Global Biotic Interactions: Ditrichocorycaeus amazonicus (Dahl F. 1894)
• Global Biotic Interactions: Pontella meadi