Please help cardalfish

[Perthegallon]

Hello guys so I have this fish who just came in about week ago who was happy and swimming around and now seems ready to die he’s gasping for air as he no longer swims and just lays on the sand bed??? They came in a trio but it seems one is attacking the other 3

 

[Perthegallon]

The 2 have been spectated from the 3

 

[Perthegallon]

Please help

 

[Perthegallon]

It’s also a 65 gallons tank with not any aggressive fish in it #reefsquad

 

[Uncle99]

I don’t remember this group being famous for attacks on themselves, maybe he’s just sick?
They usually just “hang” mid water.
Can’t see the second video, but the first pic shows a smaller card looks quite beat up

 

[imerk]

It’s also a 65 gallons tank with not any aggressive fish in it #reefsquad

Three things:
First, quarantine (remove) from the main tank
Second, make sure temp is 77-80 degrees
Third, give it time. Sometimes shipping is rougher on some fish than others. GOOD LUCK!!