Dual infection of fungi and Octolasmis species in mangrove crab (Scylla serrata) in Gresik, East Java

The study was conducted to identify the fungi-ectoparasite dual infections in mangrove crab (Scylla serrata) in Tanjangawan Village, Gresik, and their correlation. Observation of the gills of 40 mangrove crabs revealed that 34 (85%) were infected with either or both of the infections. Among them, while 29 (93.5%) mangrove crabs were infected by Octolasmis sp. and fungi. Only two (6.45%) had Octolasmis alone and three (9.7%) had fungal infection alone. There was a positive correlation between the fungi that infects the mangrove crab and ectoparasite Octolasmis infestation with a value of 0.718. Based on the observation, two kinds of fungi, Lagenidium sp. and Aspergillus niger were identified. The increase of Octolasmis infestations was followed by the increase in the kind of fungal type in mangrove crabs. This is the first report of Octolasmis sp. and its correlation with fungi in Gresik, East Java.