Gammarus oceanicus

are eaten by

• Global Biotic Interactions: Somateria mollissima (Linnaeus 1758) (Common Eider)
• Global Biotic Interactions: Pseudopleuronectes americanus (Walbaum 1792) (Winter flounder)

are preyed upon by

• Global Biotic Interactions: Aulactinia stella (Verrill 1864) (silver-spotted sea anemone)
• Global Biotic Interactions: Hediste diversicolor (O. F. Müller 1776) (estuary ragworm)
• Global Biotic Interactions: Alitta virens (M. Sars 1835) (Clam Worm)

eat

• Global Biotic Interactions: Dictyosiphon foeniculaceus
• Global Biotic Interactions: Rhodomela lycopodioides
• Global Biotic Interactions: Wildemania miniata
• Global Biotic Interactions: Ralfsia verrucosa
• Global Biotic Interactions: Ascophyllum nodosum (knotted wrack)

prey on

• Global Biotic Interactions: Jaera (Jaera) albifrons Leach 1814