ID these rhoms in video please

[jp80911]

haha...

yea, too bad there's not much of a market for piranhas here, not enough demand for LFS's to stock a large rhom and don't think suppliers are capable of getting something this specific, especially when it's just a var., rather than a clearly defined sp.

well will see what I can dig up. if they can get pictures prior to purchase will post here. I prefer to grow one out anyways, bet I'd get bored with a large fish relatively quickly anyways. Worse case it's not so bad ending up with a diamond.

thanks!

diamonds are great, all the rhom I've had/have are diamonds.
yea piranha is not yet a big hit in HK, too many people there likes discs and asian aros. grewing one from small to monster size will be very rewarding but as they grow very slowly after certain size (usualy around 6-7") it make take forever for them to reach 12" plus or bigger.

 

[mad ness]

bump: still looking for the piranha in this video link. just doesn't look like any rhom i've seen anywhere else before. Anyone know which documentary this was from or whether it mentions the exact river name?

http://www.youtube.com/watch?v=U6JuK4cn8HU

 

[jp80911]

that video footage is from "IMAX Killer Instincts: Piranha - Wolf in the Water"
i'm pretty sure the rhom in the footage you posted is Venezuela rhom.

 

[mad ness]

jp, thanks. yea may be ... My supplier said if i could give him either a scientific name or the location, it would make locating one much easier.

Paraguaza, Bolivar State Venezuala

quick search on internet of ven. piranhas found a photographer and website: http://www.aquatic-experts.com/Serrasalmus_rhombeus.html
i don't know it looks like the common black rhom to me...

this one looks closer to the rhoms in the video. when compared to most rhoms found online these (ven. var we'll call them) have proportionately more prounounced concave degree on the angle above the eye, much larger lower jaw/underbite, and larger red eye.

but the ones in the video do look quite large, probably larger than any rhom kept in the hobby could get. May be well matured wild rhoms look like this.

for example compared to this blk rhom:

 

[jp80911]

the scientific name is Serrasalmus rhombeus but there are different variants dedpends on locations.
the one in the video posted is most like from VZ and should look like this

sorry that I do not know the exact collection point.
the first pic you posted appears to be a type commonly known as diamond variant
here are mine
my 12"

my 8"

the second pic you posted is what commonly known as black rhom
if remember correctly both variants are from Peru.

 

[mad ness]

beauties. thanks for the post.

Yes the first pic posted on your last post most closely resembles the countours of the rhom in the video.

but there's just something way more menancing about the ones in the video to photos found online. Interesting to note, that all the rhoms show in the video clip possess the physical traits, in other words, that it's not just odd one fish. possible explainations: could just be the difference between captive kept and wild or age or diet. the ones in the vid look like old timers, but i think can leave out age, wild, and diet given plenty of (photos of) wild caught rhoms resembling ones commonly kept in aquaria suggests this to be a different type or some other explaination. Could it be a VZ that's changed over generations due to variables of a particular location? Either way, i'd say it is a different fish, genetically or not based on the way it looks.

would it be a possible theory: the photo posted, resembling the video fish, that this "shape" of rhom has only recently been introed to the pet trade and because of this, not many full grown examples/photos have found their way onto the net?

Outlining angles of the fish aside. is it just me or do the size of the eye and degree of slope of the mouth of the video fish appear larger?

Here's the vid again:
http://www.youtube.com/watch?v=U6JuK4cn8HU

do all rhoms with red eyes have a vertical black bar?

I guess it's unproven and thus inaccurate to be able to ID a fish by looks to a specific location unless a particular rhom is officially documented to only exist in one location. But since it appears most rhom var. exist in multiple locations, for now descriptions from physical attributes will have to do. (read the sticky) I think my LFS imports from Brazil. Assuming the var. I'm after, loosely ID's as "VZ" is not isolated in VZ only, that it's possible to find the fish via brazilian exporters. Or if the fish trade is organized with centralized distribution centers around airports... something like that.

anyways, he should have some larger rhoms in later this month. if there's a "VZ" with similar shape characteristics as video rhom, may give it a try. thanks!

 

[mfgl]

Keep in mind, color will change alot with environment. Had my Rhom in a holding tank for a while he was mostly silver with a blue/purple tint. I reset up his bigger tank and painted the back black, and a mixture of natural and black gravel, the tank is very dark. Now my fish is very dark. pure black on top silver on the bottom. He usually hovers just outside the beams of light and you cant even see him until he moves, looks pretty evil.

 

[jp80911]

the ones in video appears to be under feed and based on the look of them I guess the footage was probably taken just after or during dry season so they all look a little messed up due to quality of water during dry season.
a skinny rhom appears to be more "angular" compare to a fat one, thats why the shape looks different between the ones in video and the one I posted. pretty much all rhom has red eyes and a black vertical bar unless maybe some odd balls but I have yet to see one.
the picture I posted was taken by someone using flash so the eyes appear in a big more orangeish color, that's just lighting, has nothing to do with the natural color of the eyes.