Petalonia fascia (O. F. Müller) Kuntze 1898

are eaten by

• Global Biotic Interactions: Gammarus oceanicus
• Global Biotic Interactions: Acanthopleura echinata (Barnes 1824)
• Global Biotic Interactions: Littorina saxatilis (Olivi 1792) (black-lined periwinkle)
• Global Biotic Interactions: Fissurella costata Lesson 1831
• Global Biotic Interactions: Skeneopsis planorbis (O. Fabricius 1780) (flat skenea)
• Global Biotic Interactions: Fissurella crassa Lamarck 1822
• Global Biotic Interactions: Hediste diversicolor (O. F. Müller 1776) (estuary ragworm)
• Global Biotic Interactions: Chaetopleura peruviana (Lamarck 1819)
• Global Biotic Interactions: Chiton granosus
• Global Biotic Interactions: Littorina littorea (Linnaeus 1758) (Edible periwinkle)
• 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)