The occurrence of Trematodes Infection in Cantang Grouper (Epinephelus fuscoguttatus lanceolatus) at Lamong Bay, Surabaya, Indonesia

Cantang grouper (Epinephelus fuscoguttatus lanceolatus) is a type of marine fish resulted from the engineering of grouper hybridization between female tiger grouper (Epinephelus fuscoguttatus) and male kertang grouper (Epinephelus lanceolatus). The aim of this research was to know the occurrence of trematodes infested in Cantang grouper fish (E. fuscoguttatus lanceolatus) at floating net cages, Lamong Bay, Surabaya, Indonesia. The results showed that 100 samples taken from three floating net units, the total prevalence of ectoparasites in Cantang grouper was 38%. There were 4% infested with Benedenia epinepheli, 3% were infested with Neobenedenia girellae and 26% infested with Pseudorhabdosynochus epinepheli. While infestation of 5% was mixed of Benedenia epinepheli and Pseudorhabdosynochus epinepheli.