Trout, walleye, perch and catfish are common. Anglers have a choice of brown and rainbow trout, catfish, and bass. From rivers and lakes, emigrants also fished for catfish and trout. However, the province has abundant supply of fresh water fish like mudfish, catfish and tilapia. It is a nocturnal fish like many catfish. The channel catfish, lamprey, and sturgeon are among the 400 known freshwater fishes. Stings by striped eel catfish have killed people in rare cases. Examples include eels, mudskippers and the walking catfish. Vertebrates consume guano as well, including the bullhead catfish and larvae of the grotto salamander. Thailand is the only country to allow fishing for private stocks of Mekong giant catfish. No DNA samples were found for large animals such as catfish, Greenland sharks, or plesiosaurs. It is used to control certain diseases that adversely affect salmonids, catfish, and lobsters. Orangutans in Borneo scoop catfish out of small ponds. The largest flathead catfish, "Pylodictis olivaris", ever caught was in Independence, Kansas, weighing . More than half of all catfish species live in America.