Neither FishBase nor Google can find any reference to this common name. Sounds like someone making up common names pet-shop-stylee. There is a species known as Redfin Tetra and a Bloodfin Tetra, but these are both Hyphessobrycon species and look nothing like this.
This is M. argenteus as noted above, or at the very least a Metynnis of some description.
Neither FishBase nor Google can find any reference to this common name. Sounds like someone making up common names pet-shop-stylee. There is a species known as Redfin Tetra and a Bloodfin Tetra, but these are both Hyphessobrycon species and look nothing like this.
This is M. argenteus as noted above, or at the very least a Metynnis of some description.