That's no Scomb - the apistole fin would be clear with a black dot not red with a dot. Also the hummeral spot on your Tat is football shaped, Scombs are smaller and roundish.Tail fin looks pretty red to me and I have no clue where this angle stuff comes in theirs no validity to it. Scombs swim on all kinds of angles from prone to prostrate. My Scomb is dead horizantal most of the time, swims horizontal, and generally only swims on angles when hunting. I've seen these same angles on Tats, Arms, and Rhaphs. Unless I'm missing something and please do explain.
Small Round Hummeral spot and See Dead Horizanal, the pic is compressed click it to get up close and personal for compaisson to your new Tat.