Originally Posted by biokid101
i did just that.my one angelfish today is really wierd it looks like its cleaning an area on my big rock and when it leaves the other one comes in and does the dame thing. what are they doin?can different types of angelfish breed together?
As others have stated it is fairly difficult to determine sex of angelfish by any external means. The most accurate, and only trusted way is to observe when the fish are actually in the process of breeding. The female organ is flat on the end, while the male organ is rounded/pointed if I am not mistaken.
If they are doing that, most likely they are breeding.
How old are your angels? They reach maturity at around 8-12 months, but juveniles will spar in activities that look similar to the courtship rituals.
If your angels are lip locking, flashing, nipping, and cleaning (what you described with them following each other on the "cleaned" rock) chances are good that your angels have formed a pair and you will have the potential for fry.
If you do end up with fry, I recommend checking out this short 2 part documentary on youtube about angel breeding. YouTube - Documentary - Breeding the Freshwater Angelfish - Part 1 of 2