I was out getting some fish with rallysman today and decided to finally pick up a sunshine oscar. I got him home and put him in the 150 with my midas and as soon as the oscar was in there, the midas claimed her. They have only been together a couple of hours and have already dug a little home in the gravel for themselves and keep swimming around with each other. 

Didn't figure it was possible, but it made me laugh.