Pilumnus longleyi

are eaten by

• Global Biotic Interactions: Loligo plei
• Global Biotic Interactions: Pareques acuminatus (Bloch & Schneider 1801) (Highhat)
• Global Biotic Interactions: Ginglymostoma cirratum (Bonnaterre 1788) (Nurse Shark)
• Global Biotic Interactions: Cephalopholis fulva (Linnaeus 1758) (Black Guativere)
• Global Biotic Interactions: Cephalopholis cruentata (Lacepède 1802) (Coney Barbados)

eat

• Global Biotic Interactions: Xestospongia portoricensis van Soest 1980
• Global Biotic Interactions: Isostichopus badionotus (Selenka 1867) (Three-rowed Sea Cucumber)
• Global Biotic Interactions: Ircinia felix (Duchassaing & Michelotti 1864)
• Global Biotic Interactions: Mycale (Arenochalina) laxissima (Duchassaing & Michelotti 1864)
• Global Biotic Interactions: Lithopoma tectum (Lightfoot 1786) (West Indian starsnail)