Surely the residents of Malang City have heard or read articles about catfish which have 3000 cancer cells. The messages and writings stated that a mouthful of catfish meat was eaten, residents also swallowed the 3000 cancer cells. In the message and writing, it is also stated that catfish contain cancer cells because catfish live in a dirty way. The reason for the filthiest fish is what the readers emphasize the most. The message also explained that the nature of catfish that likes to consume all kinds of waste in the waters makes this fish unfit for consumption. Even an article that is quite viral on the internet mentions that human waste is also used as feed for a catfish cultivation in Haikou City, China. Meanwhile in its natural habitat, catfish is also known as a very tough fish species. This fish is equipped with an additional breathing apparatus in the form of a labyrinth, so that it can survive in muddy or even polluted water conditions. These facts have led to allegations of accumulation of carcinogenic toxins (cancer causing) in the body of catfish. This fact is not entirely true and can be trusted. Dr. Dradjat R Suardi, SpB(K) Onk, a cancer expert from the Indonesian Oncology Association, explained that to prove whether catfish have cancer cells or not, research is necessary. Currently there is no research that states if eating catfish can trigger cancer, he stressed. Meanwhile, catfish sold and consumed in Malang City are mostly cultivated in a catfish farming pond. Head of Fish Processing and Marketing Group at Sarangan Fish Supermarket, Malang City, Dm. Bambang S explained this. He said that when he wanted to supply fish, such as catfish and milkfish, he would supply them from a catfish farm. Although there are few ponds in Malang City, he takes supplies from ponds in the Sidoarjo area. Don't pick up the river. It must be from fresh water ponds where it is cultivated, he said. According to the data collected, the nutritional content of catfish is centered on high protein levels. Like freshwater fish in general. There has been no official research that states that catfish contain cancer cells like the information that has been spread so far.