They fight just the same IME.

I keep one of each in my 120 for quite a few months now, had 2 of the red ones but one decided to jump out when I was screwin with my tank. He survived for a month after that but haven't seen him for weeks and presume he's passed. They get along fine although I did hear the purple is more agressive! They swim about 5in away from each other and will criscross when feeding, also it's a good thing I got them on flakes.



http://i121.photobucket.com/albums/o...y/IM000906.jpg

I've heard that you can get away with it when there young,
But as they grow older they usually get territorial towards each other.

That being said here's my mated pair.
They have been together for over a year now,
Swim together and share the same borrow hole.
I should say that the red is actually the #2 in the attempt to pair them.
The purple killed the first in a matter of days.
http://members.shaw.ca/kabong/fire.jpg

Wow ! #1 must have been a really ugly fish !
:lol:

Thanks for all the info guys. I picked up a purple one last Friday. He's been in hiding all weekend. I don't think he knows the other firefish is there yet. I hope the mate up. If not I think the tank is big enough for the both of em.