fand diesen Arteikel auf youtube - folgender Kommentar:
The Black phantom tetra, Hyphessobrycon megalopterus, is actually red in the wild! The reasons for it being bred into black-blue forms (especially the males) after being brought to the hobby are not quite clear, but it may have been to differentiate them from Hyphessobrycon eques, the Serpae tetra. Both species will shoal together in the wild as you can see in this video.
When brought to Europe, breeders and sellers may have realised there was more money to be made in offering two distinct coloured fish, rather than simply having two very similar red tetras. Whatever the reason, the wild forms are one of my favourites! They behave quite similarly to H. eques, but are a bit less boisterous. I have spent many hours observing them in the Pantanal wetlands of Brazil, especially in the Salobra river of Mato Grosso do Sul, where this footage was recorded. ".
Hier der Link:
The Black (read 'Red') phantom tetra in its natural habitat — a video by Tai Strietman. - YouTube
Da fühle ich mich doch als Aquarianer seit Jahrzehnten verarscht!