I've had this tetra for a month or so in my tank, its been really aggressive to the other fish (probably because it's the only fish of its species in the tank, my younger sister bought it). I'm planning on giving it back to my LFS, but can't seem to identify it. It looks a bit like this hifin blushing white tetra but doesn't have the long fins. A short-finned variety? I took a photo of him/her, it's attatched to this post (I think).