Sold as a Tetra

[SumoNinja]

pirhanas

 

[le patron]

beautiful baby redbelly piranhas so cute...

 

[dragonfish18]

A TETRA!!! Im lovein it especially here in northern cali............... but a rbp for sure

 

[Gucci]

They are RB piranhas!i raised mine from the same size.

 

[myles]

pygocentrus nattereri

 

[FRANK194]

the shape looks like baby rhom or serra

 

[dudey]

pygocentrus nattereri

100%

 

[bfhslilred93]

that is definitley p. nat or red bellied piranha

 

[bumpylemon]

i agree red bellies

 

[DiXoN]

well i definately a baby piranha, a few species do look very similar at this size so 100% id is not going to happen so grow them out and see.
it should only take a couple of months to know.