serpea vs red phantom

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vero

Aquarium Advice Activist
Joined
Jan 7, 2005
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Location
Montreal, Canada
From animal-world web site: Serpea Terta (or Red Minor or Hyphessobrycon serpae)
Phantom Terta ( or Megalamphodus megalopterus the black one and Megalamphodus sweglesi the red one)

How can I see the difference between the serpae tetra and the red phantom tetra. My lfs sells both (the serpea as Hyphessobrycon bentosi and the red phantom as Hyphessobrycon sweglesi?). They look the same to me. It'd rather have the red phantom as the serpae are said to be more agressive (fin nippers - I have guppies) and the phantom are less touchy when it comes to pH (my pH is on the basic side, around 8).

Thanks
 
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