Ulvaria obscura

are eaten by

• Global Biotic Interactions: Jaera (Jaera) albifrons Leach 1814
• Global Biotic Interactions: Gammarus oceanicus
• Global Biotic Interactions: Cancer irroratus Say 1817 (Atlantic Rock Crab)
• Global Biotic Interactions: Littorina saxatilis (Olivi 1792) (black-lined periwinkle)
• Global Biotic Interactions: Skeneopsis planorbis (O. Fabricius 1780) (flat skenea)
• Global Biotic Interactions: Littorina littorea (Linnaeus 1758) (Edible periwinkle)
• Global Biotic Interactions: Hediste diversicolor (O. F. Müller 1776) (estuary ragworm)
• Global Biotic Interactions: Strongylocentrotus droebachiensis (O. F. Müller 1776)
• Global Biotic Interactions: Littorina obtusata (Linnaeus 1758) (Flat periwinkle)
• Global Biotic Interactions: Testudinalia testudinalis (O. F. Müller 1776)
• Global Biotic Interactions: Alitta virens (M. Sars 1835)