B. FLAGELLATA
1. Costiasis. Cause [is] : Sp Costia / Ichthyobodo Sp. Ichthyobodo represent parasite of obligat gum in [at] body of inang ( gill or husk) by using cytostome. [At] infection [is] hence this parasite will place x'self [at] cell coat of epithel among scale. While [at] heavy infection hence the parasite will disseminate the overall of part of fish body and even until gill. Infection can be good [of] wild fish and also fish which [is] conducting. Factor racing this parasite infection [is] density of too high fish. symptom of Klinis : fish seen is matt, like blanketed by coat which [is] ashes white chromatic effect of abundant mucus production. Haemorrahage and damage fin will seen [at] heavy infection. If gill infection hence will looked to be its gill turn pale and closed over with mucus. will lose appetite, swimming to weaken. fish sometime its body rubbing [at] pool wall or base. Preventive: controlling amount irrigate with usage of filter, preventing wild fish so that [do] not enter conducting areal, arrangement of temperature irrigate and also taper down density. Treatment : using drug which [is] usually used for the medication of parasite of protozoa faction can be [done/conducted]. Naci with dose 10.000 ppm by immersion during 15-30 minute