Proteocephalus dubius

have host

• Global Biotic Interactions: Perca fluviatilis Linnaeus 1758 (Perch)
• Global Biotic Interactions: Perca flavescens (Mitchill 1814) (Yellow Perch)

parasitize

• Global Biotic Interactions: Samariscus nielseni Quéro, Hensley & Maugé 1989 (Nielsen's righteye flounder)
• Global Biotic Interactions: Peprilus paru (Linnaeus 1758) (American Harvestfish)
• Global Biotic Interactions: Peprilus ovatus Horn 1970 (Cortez butterfish)
• Global Biotic Interactions: Perca fluviatilis Linnaeus 1758 (Perch)
• Global Biotic Interactions: Perca flavescens (Mitchill 1814) (Yellow Perch)