sera guide - Healthy pond fish

2.4 Diseases caused by flagellates Diagnosis: Ichthyobodo necator (formerly: Costia necatrix) Observation Color changes to gray or milky in some areas of the skin (reddish in case of stronger infestation); long finned fish have frayed fins; clamped fins. Diagnosis: Intestinal flagellates (Hexamita sp., Spironucleus sp. as well as other parasites such as Protoopalina sp., Trichomonas sp., Cryptobia sp.) Observation Decomposing fins, slimy, whitish fish waste, holes in and around the head, possibly emaciation. Treatment: page 28 Treatment: page 29 12 Koi with skin slime caused by Ichthyobodo necator Spironucleus sp.