Silver dollar coloration (pic)

[Fishguy2727]

Here is a pic of one of my, what I believe to be, male silver dollars and the four females. Based on the fact that two of them will sometimes show this type of coloration while the other four show a much blander coloration and are larger, I believe I have two males and four females. They seem to show this coloration in the middle of the day, especially if I fed in the morning. Usually the only way to tell the two males apart is that their pectoral fins are red. This pic is from my phone.
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[salman]

I love the silver dollars, they look really funny. But I've never seen them in my LFS.

[RobbieG]

Nice pic for a phone - I just got a camera phone today - can't wait to try it.

[jeffs99dime]

the one in the middle of the pic looks a little like a red belly piranha

[salman]

the one in the middle of the pic looks a little like a red belly piranha

Thats what i thought it was in the beggining then i thought for a little.

[Fishguy2727]

It is reminiscent of a juvenile red belly pacu (remember both are Characins, same family as tetras). That one is the male. The other male isn't in the pic but looks the same.

[salman]

What do the silver dollars live with? i want to add them to one of my tanks. I'm assuming they will live with tetras?

[Fishguy2727]

Mine are the 75 with the tiretrack eel, fire eel, gold nugget pleco, 2 bristlenose pleco, 2 Synodontis eupterus, and a baby ornate bichir.

I have tetras in my 40 community, and some cardinals in the 55 with the discus. Silver dollars are a nice fish. They are peaceful, yet large enough to go with semi-aggressive fish. I think my tank is ideal for them because no one bothers them or stresses them out, and no one is small enough to be bothered by them.