Add another Zebrasoma?

[bcournoyer5]

Hello,

I currently have two zebrasomas (sailfin and yellow tang) in my 125. They (along with 12 other fish) have been together for about 8 months, besides a Niger trigger added a week ago, and just recently started being aggressive with each other. They both let each other eat but will chase each other and fin slap. I noticed my yellow tang has a small cut probably from the sailfin tang, on his body. If I add a purple tang, with this stop the aggression?

 

[HotRocks]

Hello,

I currently have two zebrasomas (sailfin and yellow tang) in my 125. They (along with 12 other fish) have been together for about 8 months, besides a Niger trigger added a week ago, and just recently started being aggressive with each other. They both let each other eat but will chase each other and fin slap. I noticed my yellow tang has a small cut probably from the sailfin tang, on his body. If I add a purple tang, with this stop the aggression?

It's hard telling. I have a PT, YT, and a desjardini, along with 3 Acanthurus tangs and a Kole. In a 180. Mine bicker some. I have had damage once. My YT and PT bicker the most (they are similar in size 3-4"). My Achilles is growing and becoming more aggressive as well.

 

[ca1ore]

Are we talking a 6' 125 ..... or a 4'? Makes a big difference.

 

[bcournoyer5]

Are we talking a 6' 125 ..... or a 4'? Makes a big difference.

5’ 125

 

[ca1ore]

A 5' 125 is fine for a yellow tang, but much too small for a Sailfin, which can reach the size of a dinner plate. You don't say how big the Sailfin is, but it is quite possible that the lack of space is causing the escalation in aggression. I'd think adding a purple would actually make things worse.

 

[bcournoyer5]

A 5' 125 is fine for a yellow tang, but much too small for a Sailfin, which can reach the size of a dinner plate. You don't say how big the Sailfin is, but it is quite possible that the lack of space is causing the escalation in aggression. I'd think adding a purple would actually make things worse.

The yellow and sailfin tang are about 3” each

 

[HotRocks]

The Sailfin will grow rapidly as well. Just FYI.