We got my son 3 glo fish for his birthday, one died from im not sure what, but the others were doing well. Now he has an orange/peach looking one and a purple one. The purple one is smaller then the orange. I cleaned their tank yesterday as it was full of nasty algea. Now today I tried feeding them and no interest, no one else fed them. However I noticed the purple fish is really staying to the orange one and turning its back towards it and giggling around. Does the other side like that too and just stays on its tail. Do I have a male and female glo fish or why are they acting this way?