I have never seen Myrnae at Pet smart in my area. Myrnae are threatened in nature but I've seen them quite a bit on Rapps site lately so hobbiest must be doing there part to keep this beautiful species around. That being said they are not as aggressive as a convict. My female just recently killed my male so that really upset me so you might want to watch out for that. They did really well in a tank by themselves but once i added other cichlids to the tank they changed and the female became very aggressive with the male to the point of killing him. This is 1 of my favorites from the Archocentrus/cryptohero group.