Ogopogo or Naitaka (Salish: n'ha-a-itk, "lake demon") is the name given to a cryptid lake monster reported to live in Okanagan Lake, in British Columbia, Canada. Ogopogo has been allegedly seen by First Nations people since the 19th century. The most common description of Ogopogo is a 40 to 50-foot-long (12 to 15 m) sea serpent. Lake monster investigator Benjamin Radford notes “however, that these First Nations stories were not referring to a literal lake monster like Ogopogo, but instead to a legendary water spirit. The supernatural N’ha-a-itk of the Okanagan Valley Indians is long gone.”