Microphallus claviformis (Brandes 1888)

are preyed upon by

• Global Biotic Interactions: Macoma balthica
• Global Biotic Interactions: Austrominius modestus (Darwin 1854) (New Zealand barnacle)
• Global Biotic Interactions: Magallana gigas (Thunberg 1793) (oacific oyster)
• Global Biotic Interactions: Balanus crenatus Bruguière 1789 (Crenate barnacle)
• Global Biotic Interactions: Sagartia troglodytes (Price ex Johnston 1847) (cave-dwelling anemone)

have host

• Global Biotic Interactions: Calidris alpina (Linnaeus 1758) (Dunlin)

parasitize

• Global Biotic Interactions: Calidris canutus (Linnaeus 1758) (Knot)
• Global Biotic Interactions: Tadorna tadorna (Linnaeus 1758) (shelduck, common shelduck)
• Global Biotic Interactions: Jaera (Jaera) albifrons Leach 1814
• Global Biotic Interactions: Numenius arquata (Linnaeus 1758) (curlew, eurasian curlew)
• Global Biotic Interactions: Carcinus maenas (Linnaeus 1758) (Common shore crab)