I have a solid bright yellow (I'm assuming female from what I've read) Johanni about 3" long. Just in the past 3 days I've noticed one little white dot on the very end of it's bottom fin (where the other ones have egg spots). At first I panicked and thought it was the beginning of ick but it hasn't gotten any worse in the past 3 days and none of the other fish in the tank have any white dots on them so I'm pretty confident it's not ick. Could an egg spot have developed on her fin? She has no other spots or markings whatsoever. I'm not really sure exactly what the purpose of an egg spot is but I thought only the males had them. I checked the water and everything there is fine. Any ideas? 
