Yes, they are territorial. Part of it has to do with tank size (the smaller the tank, the more territorial they can be), and part of it might have to do with spawning behaviors, but 2" is a little small for that, I think. They will probably work it out. I have often had to separate males into separate tanks when they get aggressive(for goldfish) towards each other. If not, one thing you can do is take them both out of the tank, rearrange the tank, and then reintroduce them, letting them work out territories on their own. I have seen orandas be aggressive, but I have never seen a telescope that way. Interesting.