What On Earth Are These?

[wackystarfish]

Hey, i keep these in a group of four. They seem to be some kind of tetra, but in my research, i have not seen one with colours like mine. When they 'flare' their fins look a bit like sails and they glide through the water.
They have Red fins, with white tips on their plectoral ones.?? (Its the ones where their arms should be lol) Many Thanks, finlay

 

[Esfa]

serpae tetras?

 

[nigsy]

serpae tetras?

aqua hobby

 

[Colin_T]

it's a bit hard to tell from the pics but I would say rosy tetras because of the red dots on the tail. There are a couple of different species that look similar. Check out Hyphessobrycon bentosi or H. copelandi.