Help, what is this?

[music4life]

I need some help. :help: I am new to saltwater tanks, and have not delt with fish in a long time. I am about a month and a half into my tank after my tank has cycled. I was looking over one of my Damsel fish and she seem to have a spot on the tale fin. Now I know that the other fish has been a bit aggresive. What could this spot be? Is it nothing at all? Could it be a fin repairing itself? He has no other wierd behavior. He swims and is happy.
HELP, PLEASE, HELP :help:
I don't want sick fish

Devin

 

[madswife]

If her tail was nipped at then yes it is mast likely just healing its self. If not the it could be the beginings of fin rot or ich or something else.

 

[beth]

Can you get a close up of that? I'm assuming you cycled your tank with this damsel?

 

[reeferman1]

Originally Posted by Madswife
If her tail was nipped at then yes it is mast likely just healing its self. If not the it could be the beginings of fin rot or ich or something else.
What would cause fin rot? :notsure:

 

[beth]

Can you get a close up?