Any idea what this is?
I saw this insect in my tropical fish tank sitting on the filter. I saw a similar one, or perhaps the same one, floating in the water yesterday but it looked white/transparent. Do you have any idea what this is? Kind regards.
This is a Naiad in the order Odonata which contains Dragonflies and Damselflies. Naiads are aquatic nymphs of flying insects. It was probably introduced on live plants or possibly, if you purchase any live foods, along with the food source. The transparent specimen you found might have been the discarded exoskeleton after this specimen molted. Many Naiads are predatory, and will feed on small fish, especially newly hatched fry.