If you mean a Zebra Danio like fish but with orange/red anal dorsal and caudal fin markings, you probably have Danio kyathit which is a sturdy tough fish.
There are also glo-fish Danios which are genetically modified Zebras which exhibit a reddish glow over their body - I don't know about those, although I would assume they are as tough as the regular Zebras
Or do you have something else? There are other reddish Danios, but not necessarily Zebras.