Gammarus

are eaten by

• Global Biotic Interactions: Barbus lacerta Heckel 1843 (Lizard barbel)
• Global Biotic Interactions: Calidris maritima (Brünnich 1764) (Purple Sandpiper)
• Global Biotic Interactions: Cystophora cristata (Erxleben 1777) (Bladder-nose)
• Global Biotic Interactions: Pagophilus groenlandicus (Erxleben 1777) (Harp Seal)
• Global Biotic Interactions: Balaena mysticetus Linnaeus 1758 (Arctic Right Whale)

are preyed upon by

• Global Biotic Interactions: Sepia officinalis Linnaeus 1758 (Common Cuttlefish)

eat

• Global Biotic Interactions: Ascophyllum nodosum (knotted wrack)
• Global Biotic Interactions: Ulva intestinalis (Gutweed)
• Global Biotic Interactions: Ulva intestinalis (Gutweed)
• Global Biotic Interactions: Ascophyllum nodosum (knotted wrack)

have pathogen

• Global Biotic Interactions: Gammarus sp. amphipod associated circular virus