types of black piranha

[phishy jack]

1. how many types of black piranha are there?
2. can I find out what type my piranha is?

my little guy looks like this, except he doesnt have any red on his anal fin:

 

[phishy jack]

pic i got off aquascape, my little guy is just so thin from the front and for some apparent reason he nevers turn to his side when im there

 

[phishy jack]

also my little guy seems to have a brown scratch/gash on his body, how long does it take for him to heal up. how long does it takes for him to develope the notorious red eyes?

 

[jp80911]

black piranha===>serrasalmus rhombeus and there are many variants from different locations
http://opefe.com/rhom_geo.html
http://www.monsterfishkeepers.com/forums/showthread.php?t=232859
the red eyes usually develops when they hit 5" or so
the scratch shouldn't take long probably couple days to couple weeks depends on the wound, food intake, water parameters, etc.

 

[phishy jack]

can you tell what type of black variant a baby piranha is? also why does it seem that black rhoms are more wanted than the black diamonds? aren't black diamonds more rare and expensive?

 

[BigShawn]

can you tell what type of black variant a baby piranha is? also why does it seem that black rhoms are more wanted than the black diamonds? aren't black diamonds more rare and expensive?

can't tell without knowing where it was caught, as far as people wanting reg. rhoms over diamonds that depends on who your talking to.........

 

[Diogenes]

can you tell what type of black variant a baby piranha is? also why does it seem that black rhoms are more wanted than the black diamonds? aren't black diamonds more rare and expensive?

it's personal taste.

Personally, I think whenever some scientists get around to it they'll be different species.

Take the convict cichlid for instance. It used to be Cryptoheros nigrofascitus. It was recently moved to it's own genus Amatitlania with a new species description for each geographic variant. It doesn't take long looking at all the different fish from all the different parts of south america named S. rhombeus to know that a re-organization of the species is most likely going to result in some new species. I think it probably will require DNA examination however.

One thing i've learned recently about evolution is that there really isn't such a thing as a rigid species the way we typically think of it. Darwin was intentionally vague when describing the definition of a species. Binomial nomenclature is really no more than a human label for something, and we can and do change those labels all the time.

 

[jp80911]

can you tell what type of black variant a baby piranha is? also why does it seem that black rhoms are more wanted than the black diamonds? aren't black diamonds more rare and expensive?

you can't tell what variant a baby piranha is, even with the spot you could get two different rhoms.