Maximum distance swum by a father son duo

The record for swimming the maximum distance by a father-son duo was set by Soy K. K. (born on October 5, 1971) from Ernakulam, Kerala. He swam a freestyle distance of 9 km across Vembanad Lake along with his son, starting from Kumarakom in Kottayam district and finishing at Muhamma in Alappuzha district, in 5 hours and 30 minutes, on February 27, 2025, as confirmed on May 1, 2025.