see thats what i thought too, but this is the third one iv seen in 3 months. i doubt their larvae stage lasts that long. which mean either they are not damselflys, or there are damsleflys in my house from time to time, or they do in fact live that long and have been alive since they came in on a piece of bogwood or something. that might solve my problem. whats the life expectancy of a damslefly larvae? does anyone know? cause winter is here now and there shouldnt be any more adults for a while to lay eggs. so if i can just keep new ones from being laid then all i have to do is sit back through the winter and wait for these larvae to die off. then my tank will be clean again. thoughts and input?