Hello. I recently purchased a Regal Tang (5cm) for my 300L Setup. Strangely, I have had 2 Yellow Tail Damselfish (around 2-3cm) for quite a few months with other Tangs and no problems. However, when I added the Regal Tang the one Damsel decided to brazenly attack the Regal, while the other Damsel couldn't care less. What would you people do, separate the two or just wait and see if the faze passes?
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