Help!!!! Cardinal fish sick?

[Ncreefer]

Have a saltwater tank with several fishes and invertebrates. I have 1 cardinal fish that has been doing fine- all of a sudden on his left side towards the back i noticed a gash or cutlime line goin from the top to the bottom of the fish. Anh idea what this is or why its there? Fish is acting normal for itself but i just dont unnderstand this whitish line running down the left side. What is it, what caused it and what do i do to fix it?

 

[mfdrookie516]

Moved to Saltwater & Reef - Sick Fish or Coral

 

[Hondatek]

Do you have any tangs in the tank?

 

[Ncreefer]

Yes- i have 1 yellow tang and 1 blue hippo tang- the cardinal fish did indeed die but i am still curious as to what caused thus problem

 

[Hondatek]

They could of cut the cardinal with their tail fin. If your water parameters are ok it is possible that happened .

 

[Ncreefer]

Someone else also said that- i guess thats what it had to be because it was a serious gash