Sen David

Fish farms in Sihanoukville have lost an estimated 100 tonnes of fish to an aquatic parasite infestation in the past five days, Fishery Administration officials said yesterday.

The parasite, known as “marine velvet” or Amyloodinaum Ocellatum, feeds on fish tissue – giving it a powdered look – while releasing toxins. According to Europe PubMed Central, marine velvet is “one of the most serious ectoparasitic diseases plaguing warmwater marine fish culture worldwide”.

While officials did not have exact figures, Nen Chamroeun, chief of the Fishery Administration in Sihanoukville, estimated the damage at 100 tonnes, because the parasite hit nearly 100 pens, each of which contains several tonnes of fish. Chamroeun said poor local conditions contributed to the outbreak.

read more: http://www.phnompenhpost.com/national/parasite-blamed-fish-deaths-sihanoukville

As a fisheries manager myself all i can say to them is the solution to pollution is dilution. This must be your starting point.