I have this pair of Cryptoheros panamensis for 5 years. Ever since they paired up, they are nearly inseparable, always hang out together like love bird, and fight battle side by side. I have other CA/SA that paired up, quarreled and divorced, and never form as strong a bond as this pair. I wonder if it is because I keep them in community tank with larger tankmates that constantly pose threat to them, so they stick together stronger.