So I have a 75 gallon that I used as a hospital tank for awhile. Somehow fish kept ending up in there (go figure). I now have a male and female kribensis who are not paired up, a male jewel and a female convict. I added the convict because my daughter really likes them and I know they can hold their own with the jewel. Immediately the jewel and convict started swimming around each other showing off what seemed to be flirting. The next day the convict dug a couple of pits and now her and the jewel are hovering around this one particular rock. Did I just witness love blossom between these two? I know they wont be able to breed but is it common for two fish, being from different parts of the world, to pair up? Any similar cases?