They are actually very close relatives of the common carp ("Cyprinus carpio"). Cyprinus carpio is the number one fish of aquaculture. Koi were developed from common carp ("Cyprinus carpio") in Japan in the 1820s. The common carp, "Cyprinus carpio", is originally from Central Europe. European carp ("Cyprinus carpio") are present within both Longneck and Pitt Town Lagoons. Minor threats include the introduction of common carp ("Cyprinus carpio") into the area. In captivity, Cyprinus carpio have lived as long as 47 years. There are also abundant common carp ("Cyprinus carpio") in Eagle Lake and the Kalamazoo River. "Cyprinus carpio" is the number 3 fish of aquaculture after grass carp and silver carp.