Brycon hilarii (Valenciennes 1850)

are eaten by

• Global Biotic Interactions: Caiman crocodilus (Linnaeus 1758) (Common Caiman)
• Global Biotic Interactions: Serrasalmus marginatus Valenciennes 1837
• Global Biotic Interactions: Pygocentrus nattereri Kner 1858 (Red-bellied piranha)
• Global Biotic Interactions: Metynnis maculatus (Kner 1858) (Silver dollar)

are parasitized by

• Global Biotic Interactions: Spirocamallanus inopinatus (Travassos)
• Global Biotic Interactions: Neocucullanus multipapillatus
• Global Biotic Interactions: Goezia brasiliensis Moravec, Kohn & Fernandes 1994
• Global Biotic Interactions: Goezia brevicaeca
• Global Biotic Interactions: Echinorhynchus briconi Machado-Filho 1959

eat

• Global Biotic Interactions: Guarea guidonia (L.) Sleum. (American muskwood)
• Global Biotic Interactions: Guarea guidonia (L.) Sleum. (American muskwood)
• Global Biotic Interactions: Zanthoxylum riedelianum Engl.
• Global Biotic Interactions: Margaritaria nobilis L. fil. (bastard hogberry)
• Global Biotic Interactions: Crateva tapia L.