What is this on my tang?!

[matiLanza]

Last night before lights out he seemed fine with no spots, He has been eating brine like a big and seems to swim happy and fine.What is it ??

<a href="http://s510.photobucket.com/albums/s343/mlanza44/?action=view&current=IMG_2013.jpg" target="_blank"><img src="http://i510.photobucket.com/albums/s343/mlanza44/IMG_2013.jpg" border="0" alt="Photobucket"></a>

<a href="http://s510.photobucket.com/albums/s343/mlanza44/?action=view&current=IMG_2011.jpg" target="_blank"><img src="http://i510.photobucket.com/albums/s343/mlanza44/IMG_2011.jpg" border="0" alt="Photobucket"></a>

 

[DustyReefer]

He could have run into something pretty hard or another fish hit him? Looks like some sort of bruising, I'd just watch him for a couple of days and see if there are any changes. As long as he keeps eating and acting normal I wouldn't worry about it quite yet

 

[rssjsb]

Yes, keep an eye on him. Also, you probably know this, but I would try to wean him off the brine and onto something more nutritious like mysis, then pellets, as soon as possible.

 

[matiLanza]

Well everyone, Thanks for the help but this morning I found him dead at the bottom and I don't understand why . My first loss, yesterday is when I found the spot, he was swimming and eating but what can I do .

 

[DustyReefer]

Was there bullying going on from another tang? I noticed the PBT in the picture, and they can be pretty aggressive

 

[matiLanza]

No the PBT got along with him just fine, the PBT swam around and minded his own, never saw him attack the naso nor did i see and off my other fish bother him. Test my water and everything is spot on. He was eating nori, brine, and a little of mysis. The both went in together about a week ago and seemed very healthy.

 

[dzfish17]

No the PBT got along with him just fine, the PBT swam around and minded his own, never saw him attack the naso nor did i see and off my other fish bother him. Test my water and everything is spot on. He was eating nori, brine, and a little of mysis. The both went in together about a week ago and seemed very healthy.

Did you quarantine these fish?... if not, you better keep a close eye on all your fish and be ready to remove and treat.