Tommy, I have a dogface puffer (see avatar) and had both a yellow tang and a mild-mannered Huma trigger (3 1/4"). I say mild-mannered because he let me pet him and overall didn't bother the other fish.
I thought I had a happy family until I saw a change in my puffer's attitude. The Huma just went nuts at feeding time-they're very fast swimmers. I started to see my puffer spend more time on the bottom sleeping. I felt so sad because I really had become used to my puffer watching me and begging for my attention (and food), but I assumed that it was tired of watching me.
To make a long story short, the Yellow Tang fell in love with the Huma and followed it everywhere doing the 'sex dance' as my wife calls it, all day. The Huma finally got frustrated and the poor tang got stressed. I moved the Huma to another tank and was amazed to see my puffer come back to life, instantly.
Moving that Huma was the best thing I could have done. My puffer heartily agrees. No more aggressive fish in that tank.
And yes, the puffer gets plenty to eat. I feed my fish by hand and they take turns (except the Huma). I had to throw his food in the corner and play 'fetch' with him. The Huma would try to snatch the food away from the other fish.
Also, my puffer chews on the live rock and tries to eat the Blue-leg hermits.
Moral of the story: IMO decide what's more important to you. Do you want to have a wonderful, happy, responsive dogface or would you enjoy a full tank with a possibly agressive trigger? I have my answer.
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