Lucas da Cruz Kanieski (born January 25, 1990 in Dourados) is a Brazilian competitive swimmer.At the 2010 South American Games, Kanieski won the gold medal in the 800-metre freestyle, and two silver medals in the 400-metre and 1500-metre freestyle.He was at the 2010 Pan Pacific Swimming Championships in Irvine, where he finished 12th in the 800-metre freestyle, 18th in the 1500-metre freestyle and 27th in the 400-metre freestyle.Kanieski competed at the 2010 FINA World Swimming Championships (25 m), in Dubai, where he finished 23rd in the 400-metre freestyle, eighth in the 1500-metre freestyle and also eighth in the 4×200-metre freestyle.
In the 1500-metre freestyle, broke the short-course South American record, with a time of 14:45.51.At the 2011 Pan American Games, Kanieski won the silver medal in the 4×200-metre freestyle, by participating at heats.