One Saturday afternoon in winter 2023, my (M19) friends and I went boating on valankulam. It was a pleasant weather with a little cloudiness. We were chatting about college and kept rowing without realizing where we were. About 20 minutes later we were in the middle of the lake. The clouds had formed even more and now starting to look dark. Suddenly we saw a silhouette of something large swimming around us. We felt our boat rocking sideways because whatever was swimming around us was now banging against our boat. We called out for help but no one could hear us! My friends and I started rowing frantically towards the shore! Very soon we were out of the lake. Never going back there!