What is the common name of this fish?

Question

the scientific name is metynnis rose veity its a pretty big fish, its silver, has a couple of black spots and has a red back fin , it belongs to the same family of silver dollar fish i cant be exact but it looks about 4-7 inches long please help

Answer 1

I searched for that exact scientific name but came up empty-handed but I did find another fish in the metynnis family that goes by the scientific name of Myleus rubripinnis AKA the Red Hook silver Dollar.

Here's a picture-- http://www.practicalfishkeeping.co.uk/pf...

As for keeping a single beta in a community tank-- that should be fine as long as you dont put it with really tiny fish or other fish that are really agressive