I just picked up some of those as well. Very pretty and peaceful fish.
My LFS had them labeled as "Frost Tipped Tetras," but Google doesn't
come up with anything searching on that. I've treated them like about
any other Tetra of the same family and they are doing well.

Cheers!
Paul


Marco Schwarz wrote:
Hi..

[...Species HY511...]
Are you familiar with any other species of it's likely
genus..?
No. Any thoughts?

Well.., if I were you and delighted with a species of a
genus I've never before had any contact I would primary try
to collect any information relating to it's likely genus
(Hyphessobrycon) and other similar looking species of this
genus and so on (magazines, books, internet)..

Although each well kept species will show much of it's
typical behaviour the most species of one genus will show
somewhat of a common (genus) behaviour, too.

Hmm.., I'm no tetra specialist but were always interested in
fish's behaviour. So my very first impression was - when I
saw it's pics - it might possibly be a Pristella species,
too..

Seem finally to be your privilege to study it and it's
typical behaviour in an environment it might love..

Hope to read more about it/you, too..

Have fun..

--
cu
Marco