I have a couple of similar but slightly smaller about (1cm) similar looking things but with wings in my puffer tank. I feed him live bloodworm and so is it possible for them to go through their life cycle and become red mosquitos in a tank? If so could they be harmful at all?
Violet, You're a legend. That's deff what he is. Google images has a picture of a green one taken from above and he looks exactly like that now. As I've no fish in the tank (stinking landlord) I'll just leave him be I think.