I had gone to kerala for trip of 10 days. It was raining heavily early in the morning. We waited for the rains to stop. Once the rain stopped, we started for fishing in the chalakudy river beside the house. We first used earth worms as baits and got only one fish, the second day we tried using capon intestine as bait and got more fishes. They were quite heavy. They gave a nasty sting when not properly handled.Can anyone tell me the english name of this fish.