Cardinal fish

[thefishyboy]

Hi all

I have two bangai cardinal fish in my 100gal tank. I really wanted a mated pair and thought that I had one as up until a week ago they spent most of the time following each other around the tank. But all of a sudden the larger of the two turned on the smaller one and chases it constantly. Does anyone know why the behaviour has changed and wether I need to do anything about them as I don't want them to kill each other. As I said I would like a pair of these fish and don't want to take one out unless I have to as I don't know how I could catch one as I have a lot of rock work that I wouldn't be able to take out. Also is it possible to sex these fish to check if I have a boy and a girl or not? Any advice is appreciated

These were my very first saltwater fish and I really enjoy having them in my tank but would like to stop them fighting all the time.

Thanks

 

[Deberber]

How long ago did you get them? It could be possible the one is just establishing dominance over the other...maybe? I know clowns do that and then also schooling fish.

 

[thefishyboy]

Been in the tank 7 months now no problems until recently

 

[jayball]

That is about how long my "pair" lasted. The way to sex them http://www.advancedaquarist.com/blog/how-to-determine-the-sex-of-banggai-cardinalfish .

 

[thefishyboy]

Thanks this article looks great will have a look at my fish after feeding today to see if I can sex them both

 

[jayball]

Good luck, I tried when I purchased(and was wrong). They are also surprisingly difficult to catch. They can move when they want to.