Identification of Morphometric and Intensity of Marine Leech Zeylanicobdella Infestation on Cantang Grouper from Brondong District, Lamongan and Mandangin Island, Madura

Cantang grouper (Epinephelus fuscoguttatus lanceolatus) is the result of hybridization between female tiger and male fish which widely cultivated because it has fast growth, easy to breed, lower cannibalism. Cultivation cantang can be carried out in semi-intensive ponds floating net cages (KJA) have potential for nursery rearing activities. One problems cultivation presence disease attacks caused by marine leeches Zeylanicobdella with a prevalence up 100% culture cages. This study aims determine differences species intensity leech infestation from Brondong District, Lamongan (FNC) on Mandangin Island, Madura. The method used this research survey sampling done purposive method. groupers measuring 15-20 cm 20-25 each were taken as many 35 individuals. Identification using binocular microscope making sketches ectoparasites help equipped lucida camera. Marine found infest arugamensis was body surface, fins, gills, eyes. results statistical analysis Mann-Whitney U test showed that there no significant difference (p>0,05) reared medium category (14,74 individuals/head) (27,74 individuals/head). highest 27,74 individuals/head. There both included category.