are these unusual??? I haven't seen them before... Petitella georgiae

[Magnum Man]

they look very similar to Hemigrammus rhodostomus, of which I have a nice size school of... not sure how you would tell them apart...

Rummynose Tetra (Hemigrammus rhodostomus)

Rummynose Tetra (Hemigrammus rhodostomus) for sale from Dans Fish at $6.99 each. Shipped Next Day Air.

www.dansfish.com

Petitella georgiae The Wet Spot Tropical Fish |

Petitella georgiae The Wet Spot Tropical Fish |

www.wetspottropicalfish.com

mine are actually the "platinum variety of Hemigrammus-rhodostomus, which have shinier scales across the middle of their body...

Platinum Rummynose Tetra (Hemigrammus rhodostomus)

Platinum Rummynose Tetra (Hemigrammus rhodostomus) for sale from Dans Fish at $7.99 each. Shipped Next Day Air.

www.dansfish.com

 

[Magnum Man]

OK... more info on Seriously Fish...

Petitella georgiae – False Rummy-nose — Seriously Fish

www.seriouslyfish.com

 

[Magnum Man]

and on the 3rd species of Rummy nose ( some more info in the notes )

Hemigrammus bleheri – Firehead Tetra (Hemigrammus bleheri) — Seriously Fish

www.seriouslyfish.com

 

[Magnum Man]

more seemingly good info here...

Brilliant Rummynose Tetra – Detailed Guide: Care, Diet, and Breeding - Shrimp and Snail Breeder

The Brilliant Rummynose Tetra, scientifically known as Hemigrammus bleheri, is a stunning fish. It has gained popularity among aquarium enthusiasts worldwide due to its availability and peaceful temperament. However, despite its popularity, I would strongly discourage beginners from choosing...

aquariumbreeder.com

 

[GaryE]

This was one of the first fish that made me question the usefulness of English trade names, back when I was much younger. We used to get all three in pet stores, all sold as rummy noses, and it was fun(ish) to figure out which one you had. I seem to recall Petitella being seen as hardier. They were for me.

It was much later that the hardwater Asian rummy nose was discovered and brought into the hobby.

No one I know talks about "rummys" anymore, as a phrase for far gone alcoholics with burst blood vessels on their noses. The name reflects a tragic era - the post World War PTSD world of widespread alcoholism among troops who'd seen and lived things no one should have to. That's a not fun fact from another time, reflected in the then new post war hobby of fishkeeping. Aquariums were a huge fad 75 years ago. It's strange, when you think about it.

 

[Magnum Man]

it doesn't help less complicate anything, when they line breed, or whatever the "platinum" morph is... and then I think it was hinted about them moving the Hemigrammus fish into the Petitella family, in the article last linked above... guessing it's only a matter of time until they do Tetras, like the Cory's

 

[GaryE]

Tetras have had some changes already. DNA tells a different story than the human eye does sometimes. I think for a long time, a lot of new tetras were put into Hemigrammus and Hyphessobrycon until someone sorted them out. It's only recently that 'someones' have arrived with the means to do it.
Researchers tend to get to the things we can't eat long after the things we can, and it's probably only because of DNA costs dropping that anyone actually looks at these 'unimportant' fish.