I keep 2 koi carp, and have noticed a black sort of jelly forming in the pool of the waterfall, is this BAD?

blundetr asked: The fish appear to be quite happy, and the water is clear,blanket weed under control, there are also 3 gold fish in the pond, I hope it is,nt serious, as my koi are over 10 years old and about 14 inches long.

How do I prevent my koi fish to stop ******* one of my older bigger goldfish?

A Thousand Years of Dreams asked: I **** my fucking koi fish. That ***** always ***** and want to **** the private part of my goldfish. My goldfish run away but the koi always follow to ****. Any help plz?
I only have 2 fish, both of them in a small tank. The koi fish is [...]