标题:Marine Leech Zeylanicobdella arugamensis Infestation As A Predisposing Factor For Vibrio alginolyticus Infection On The Hybrid Grouper “Cantang” ( Epinephelus fuscoguttatus x Epinephelus lanceolatus) From Traditional Ponds In The Kampung Kerapu Lamongan East Java Indonesia