what is the difference between a red throat and a black piranha??

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yea is been a year and I was lead to believe it was a rhom since that is when I ask for when I brought him.
It looks like you have a Sanchezi according to your pics. I have never seen a Rhom with that much color before.

pics you posted are 100% sanchezi

The fish I have that you called a sanchezi. He only has red throat when is at night but I took some picture again in the morning
and he doesn't have red throat for some reason, do you still think he is a SANCHEZI or a RHOM??


the next set of pictures I took in the morning and he doesn't have red throat only a little red on the gill, but when I took it at night, the first 5 he has red throat which shows a lot,

http://picasaweb.google.com/Johnseito/Fish#

let me know what you think, do you still think he is sanchezi or rhom?
 
I don't know, he may have red throat due to stress or when he sees me, because as I was looking at him, he starts to get redder and redder, when I first woke up and look at him, he is completely almost no red as you could see in the pictures.

20 mins later he start showing a litte red again.
 
still looks sanchezi to me.

You will be able to tell 100% by looking at the scutes as jp posted. But does not look rhom at all too me.

p's often loose their color with the lights off and they come back during the days. My rbs lose all their colors when the lights go off and right when they come on in the morning then regain them shortly after the lights are on
 
what Rich said. if you look at the fish in the morning right after you turn the light on the color will be faded a bit, or if you suddently turn on the light at night you'll find the color is also faded. it's normal for piranha to loose color during sleep and regain them once they wake up. what you have is a sanchezi.
 
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