Geographic Variant Morphology in S. rhombeus

caribemob

Piranha
MFK Member
Feb 24, 2008
2,413
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philadelphia
looks marginatus, never seen spotting on a 6'' rhom never and i had them all, unless he's smaller and i cant tell, but his eyes are red might be rhom though
 

jp80911

Dovii
MFK Member
Mar 7, 2008
6,030
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NJ
Trigga, that's one sweet rhom you got there.
 

jonahonah

Feeder Fish
MFK Member
Mar 28, 2006
1,108
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CANADA
Trigga if you look at mine, which people think is probably of the rhom complex (notice not sp) he has spotting too, visible but not as much as yours and hes maybe an inch shorter than yours. So to cut this short i dont think we can give creedance to the older ways of id'ing rhoms as each species/ sub sp/ locality variant has different development schedules and traits
 

Trigga

Jack Dempsey
MFK Member
Feb 10, 2009
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It's a rhom for sure according to frank from opefe.. Not sure if he is a member here but he knows his piranha. I had to call to check local and the order was from Bolivia... Go to opefe and you will see a huge rhom George fear caught with spotting.
 

jonahonah

Feeder Fish
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Mar 28, 2006
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Trigga
:I was definitely not trying to say that yours is not a rhom in any way shape or form. I was trying to say that the rhom complex is so diverse in their appearance there is a lot of is it/isnt it when each of gets what we believe to be a rhom. It with the variation in them usually turns out that they are rhoms but theres often doubters out there as it doesnt fit with their idea of what a rhom should be/look like

I apologise if you felt i was doubting your great looking fish and I too trust franks judgement but im waiting on pfury for his opinion on mine.
 

Trigga

Jack Dempsey
MFK Member
Feb 10, 2009
135
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I agree dude I was so unsure of him when I first bought it I thought it might be a compressu because it had bars but that was just because it was freshly caught and underfed.. It eats daily now and those bars are gone.
 

DaxD

Gambusia
MFK Member
Aug 22, 2009
333
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New Ringgold, Pa.
Diogenes;2997698; said:
I thought that it might be a good idea to post up some descriptions and ways of telling apart the different color morphs of S. rhombeus. I for one think a rhom is a rhom is a rhom, but I'd like to know how to tell them apart. So I'm gonna post up some "types" of rhoms and some pics, and I'm hoping you guys will chime in with some good info on the various types of rhoms.

We're looking for how much they cost, how rare they are, where they come from, and how to tell them apart from one another. I'll do the first one and maybe somebody else can post up the second one.

Here we go:

My personal favorite color of rhom is the jet black high back. They don't seem quite as popular as the diamond rhoms, but I think they look downright nasty, and to me thats a good thing.

Jet Black High Back:


Price: I found this listing on AS. It's a 12" and it's listed at $500 bucks.

Country of origin: Peru

How to identify: The jet black high back is extremely dark in color. These rhoms are truly deserving of the common name "black piranha." Also they appear to be more laterally compressed than some other rhom variants, with an extremely "tall" back, which gives the fish an almost disc like over all shape. All rhoms have red eyes.

Rarity (common, uncommon, rare, very rare,): rare

I hope somebody will write a profile like this for the other variants. Blue diamond anyone?

-C
The true serrasalmus rhombeus is limited to Guyana. It is an amazing species of piranha and it is a very large species. The only way to really know if it is a true serrasalmus rhombeus is if you do a DNA test on it, Lol. I was only joking about that, but it is true. The maximum size is 18" according to South American locals and in the aquariums they can reach a size of 12" and above. Now if your talking giants, you can find them in the wild as large as 18"+ (very rare). This species of piranha is my favorite piranha and they are very interesting to raise. Good luck.
 

Diogenes

Fire Eel
MFK Member
Oct 9, 2008
2,407
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Birmingham, AL
DaxD;3405873; said:
The true serrasalmus rhombeus is limited to Guyana. It is an amazing species of piranha and it is a very large species. The only way to really know if it is a true serrasalmus rhombeus is if you do a DNA test on it, Lol. I was only joking about that, but it is true. The maximum size is 18" according to South American locals and in the aquariums they can reach a size of 12" and above. Now if your talking giants, you can find them in the wild as large as 18"+ (very rare). This species of piranha is my favorite piranha and they are very interesting to raise. Good luck.
???


as far as I know, rhoms are found in Bolivia, Brazil, Columbia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. There are many ways to ID rhoms besides DNA. Matter o' fact, there are a number of members here and on other forums that can ID rhoms in their sleep. Might want to reconsider this statement, and do a little more research.

http://opefe.com/genusSerrasalmus.html

http://opefe.com/rhombeus.html
 

DaxD

Gambusia
MFK Member
Aug 22, 2009
333
2
18
51
New Ringgold, Pa.
Diogenes;3406349; said:
???


as far as I know, rhoms are found in Bolivia, Brazil, Columbia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. There are many ways to ID rhoms besides DNA. Matter o' fact, there are a number of members here and on other forums that can ID rhoms in their sleep. Might want to reconsider this statement, and do a little more research.

http://opefe.com/genusSerrasalmus.html

http://opefe.com/rhombeus.html

I have done a lot of research on this species and the truth is that a lot of people do not know what they are really buying. A true serrasalmus Rhombeus can only be proved that it is a true one by a DNA test. There has been so many cross breeding in the wild that it is hard to tell if you really do have a true serrasalmus rhombeus. I kind of have doubts on people that can identify them in there sleep. I also understand a lot of people think they know piranha and they really don't. Just by looking at a piranha does not prove that it really is a true serrasalmus rhombeus. Good luck.
 
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