Are Endler's Fin Nippers?

[JezzaBeadle]

Hi, just purchased some Endler's Livebearers for a tank which also has some red tailed guppies in. I've noticed one of the Endlers chasing one of the guppies and it looks as if he's trying to bite its tail. None of the other tetras ever chase/nip the guppies, do you think the Endlers could be a problem or do you think they'll stop doing it soon?
Thanks.

 

[toddnbecka]

The problem with mixing Endler's with domesticated guppies (aside from crossbreeding) is that the Endler's are almost certainly more vigorous since they haven't been inbred for many, many generations to isolate color and fin characteristics. Consequently, they will outcompete the guppies for food and females.