They both look like they come from the same region (I think Pacific). To my knowledge only the males develop streamers.Thanks. They have been transformed for about 3-ish years now. I guess I have had them maybe 4 years.
Notice that one has a streamer on its dorsal fin while the other does not. I believe that means they originated from different parts of the world.
I am not sure. I have heard accounts of them improving and others of them not. Mine never improved, but did stop getting worse.