<![CDATA[Ectoparasites can cause large numbers of deaths in fish. The effects of ectoparasites on fish (as hosts) in the form of mechanical damage, nutrient uptake and toxic effects can reduce fish stock density and reduce fish quality due to defects. Eels are a freshwater fishery commodity with quite high economic value. The aim of this research is to determine the types of ectoparasites that attack Swamp Eels (Synbranchus bengalensis) and to determine the condition of water quality during research in tarpaulin ponds at the Yosua People's Nursery Unit (UPR) in Hawaii, Sentani District, Jayapura Regency; The research lasted for 3 months, namely March to May 2023. Sampling was carried out at the "Josua" Community Seedling Unit (UPR) in Hawaii, Sentani District, Jayapura Regency. Next, the samples were taken to the Fish Disease Testing Laboratory at the Jayapura Fish Quarantine, Quality Control and Safety of Fishery Products Center to identify ectoparasites that attack Swamp Eels (Synbrancus bengalensis). The method used in this research is the survey method. The results of the research show that there are 2 types of ectoparasites that attack Swamp Eel (Synbrancus bengalensis), namely: Trichodina sp and Lernaea sp. The body parts attacked by parasites are: gills and mucus. Water quality parameters include: pH ranging between 6 - 7 and temperature ranging between 26 - 29 ºC. The water quality at the research location is still within the normal range for the life of Rice Eel Fish (Synbrancus . bengalensis).]]>
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