Some new tetras. Not sure what I got?

[86 ssinit]

I got some new tetras yesterday. Tiny little guys. I’d say nano fish. Was told they were brass/gold tetras. Most look silver and a few gold. Nice looking fish all schooling together. Still nervous about new tank. But these guy are smaller than the articles for gold tetras and anything for brass tetras just goes back to gold. So anybody no what these are? you can get an idea of size by the cherry shrimp in pictures.

 

[chromedome52]

Size is not relevant to ID, as these are almost certainly just young fish. It's that time of year when the first young from the previous breeding season are reaching sellable sizes. Most often these are only 3-4 months old, and usually achieve sexual maturity around 9-10 months. They can grow a bit more after that, but it tends to slow down. They wouldn't normally live very long in the wild but can get close to 2 inches with good care.

The usual species is Hemigrammus rodwayi, the gold color is reportedly a parasite that they only seem to have when collected wild. Many are commercially bred these days, so the color is usually more silvery, though it can vary a little.

 

[Fishfur]

They look a bit like Silvertips - the Gold tetra doesn’t have those white fin tips but there’s no red in the fins which there would be in Silvertips.

Silvertips are the species Hasemania nana for all the help that will be.

 

[bgarthe]

I’m leaning towards the Cochu Blue Tetra…..
Boehlkea fredcochi, Knodus borki, Hyphessobrycon margitae.
I’m not an expert, but just sharing my hypothesis.

 

[Hellfishguy]

I agree with Chromedome52. They’re gold tetras, Hemigrammus rodwayi.