Firemouth Behavior

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This Younger Spouse

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The two Firemouths (about 2.5 inches long) in my 55 gallon have shown some interesting coloring/behavior.

I just put in the 55 gallon. It's got ivory sand for about 50 percent of the bottom surface, with bog wood waiting to go in and a variety of rocks and rock caves already there. Also, I haven't put up a background yet (it'll be black fleece), and there's a window behind the tank.

So one Firemouth is really, really pale, much more pale than it was in my last tank, which was a darker environment. With that fish, I'm wondering just how much is color change due to environment, or if there might be some other issue. When the lights have been off at night and I come in and turn them on, the Firemouths and Jack Dempseys are of course quite a bit darker.

The second Firemouth, slightly larger, has developed significant regions of jet black coloration on the front of and bottoms of its gills, and starting today has begun approaching the other Firemouth closely and spreading its gills out in some sort of display.

Both individuals have the long fin tips my reading indicates mark them as males. They are not fighting or sparring. They are both eating aggressively and are curious and moving around the tank well when the lights are on.

These Firemouths are about to go into a community tank my spouse has (the concensus in another thread on these forums is that, based on the fish in her tank, it should remain an amicable community). But she's a little concerned about the paleness of the smaller Firemouth. She sees some skin/scale areas that appear dull to her, with others appearing more shiny. I don't see what she's seeing, so I thought I'd raise that point along with the others.

Cheers!
 
It sounds like your darker firemouth is the dominant one and the other has lost his colouration due to this. This is probably due to them being put into a new tank and needing to sort out the pecking order.
 
It sounds like your darker firemouth is the dominant one and the other has lost his colouration due to this. This is probably due to them being put into a new tank and needing to sort out the pecking order.

That makes good sense.
good.gif
 
So when I move them into my 55g in a couple days (waiting for my new cories to settle in a little first) does that mean they'll have to start this all over again? I have a lot more cover in my tank, so maybe they'll be able to just find their own space?

And if they're both males, what's the best course of action? Rehome one and get a female or two? Rehome them both? I'm admittedly a bit on the fence about adding them.
 
When i had sand with my FM's they were very pale, when i changed up to black gravel they went much darker.....i eventually switched back to sand again and they went pale again :p
 
Afraid so!

I would rehome one, which ever isn't your favourite. The problem with firemouths is unless you know for sure its female you won't be able to go to the lfs and pick one out of the tank. You may be better rehoming one, then going to the lfs and getting 2 or 3 more then add all of them including your original one to your tank at the same time.
 

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