The history of Kulathupuzha Sastha Temple is deeply intertwined with local folklore. Legend says that Lord Ayyappa appeared to a devotee in the form of a child near the Kulathupuzha River. The devotee, realizing the divine presence, built a temple at that spot. The unique tradition of feeding fish is said to have originated from the belief that the fish are sacred representatives of the deity. Over the centuries, the temple has evolved, with additions and renovations reflecting the devotion of its followers. It continues to be a significant religious and cultural center, preserving its ancient traditions and beliefs.