Symphodus roissali (Risso 1810)

are eaten by

• Global Biotic Interactions: Scorpaena porcus Linnaeus 1758

are host of

• Global Biotic Interactions: Gaevskajatrema perezi (Mathias 1926) Gibson & Bray 1982

are parasitized by

• Global Biotic Interactions: Hysterothylacium fabri (Rudolphi 1819) Deardorff & Overstreet 1980
• Global Biotic Interactions: Gyrodactylus crenilabri Zaika 1966
• Global Biotic Interactions: Cryptocotyle concava (Creplin 1825)
• Global Biotic Interactions: Holorchis pycnoporus Stossich 1901
• Global Biotic Interactions: Metadena pauli (Vlasenko 1931) Yamaguti 1958

are preyed upon by

• Global Biotic Interactions: Scorpaena porcus Linnaeus 1758

eat

• Global Biotic Interactions: Idotea balthica (Pallas 1772)

have endoparasite

• Global Biotic Interactions: Golvanacanthus blennii Paggi & Orecchia 1972