I do have sand in my tank so might get one of them. If I can def move the tang when he gets too big do you think that its ok? ThanksI will say that both the pink streaked and possum wrasse will tend to be shy, while my melonarus wrasse is always out during the day hunting pods and swimming around. So if you’re wanting a fish you can watch, I would lean towards the melonarus. He will probably be one of the biggest fish in your tank though so I would add him after the others. Also make sure you have a sand bed for him to sleep!