fish fights - yellow tang, dwarf angel

[RouJr]

I have a keyhole angel who was introduced to my DT about 3 weeks ago and a Zebrasoma who was introduced 2 weeks ago. I was wondering if them rubbing up against eachother and seeming to size eachother up is that aggressive behaviour? sometimes it seems like the Zebrasoma is using its razor scales when they rub together.

 

[Jinko]

Doesn't sound like anything to worry about, just sounds like they are finding a pecking order of sorts.

Tangs fighting generally starts off with posturing, tail slapping and then relentless chasing, normally one fish will back down or hide for a few hours.