im positive i have a pair but the bigger one possibly the female darts at the smaller one (male possibly) and the male will shake sometimes. I have been feeding them their variety of food. The water quality and chemistry is great. I added an anemone replica about a week ago and they have accpted it as a host near the anemone i have a barnacle and the male guards it and female goes in it every so often. they don't go very far from each other. there are no other fish in the aquarium and it is 20 gallons. i shut the lights on and off on a constant schedule. Are they going to spawn? 
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