Rhipidocotyle pentagonum (Ozaki 1924) Eckmann 1932

are endoparasites of

• World Register of Marine Species: Scomberomorus niphonius (Cuvier 1832) (土托) (adult)
• World Register of Marine Species: Euthynnus affinis (Cantor 1849) (Little tunny) (adult)
• World Register of Marine Species: Psettodes erumei (Bloch & Schneider 1801) (咬龙狗) (adult)
• World Register of Marine Species: Auxis thazard (Lacepède 1800) (Frigate tuna) (adult)
• World Register of Marine Species: Katsuwonus pelamis (Linnaeus 1758) (Skipjack tuna) (adult)

geographic distribution

• World Register of Marine Species: Japanese Exclusive Economic Zone
• World Register of Marine Species: Southern China
• World Register of Marine Species: Red Sea
• World Register of Marine Species: Eastern India
• World Register of Marine Species: Eastern India

trophic guild

• World Register of Marine Species: endoparasite
• World Register of Marine Species: endoparasite
• World Register of Marine Species: endoparasite
• World Register of Marine Species: endoparasite
• World Register of Marine Species: endoparasite