Gonna try this again...As most have prolly figured out...Tropicals are not my cup'o tea but hey I am always up for learning....Anyway here goes..
Would that be Exodus paradoxus? If so here's a little info:
Range: Amazon Basin to Guianas
Size: 3" breeding size around 2.5"
Temperature: Can tolerate 68-90 degrees F, optimum around 75 F
Temperament: Moderately peaceful with larger fish, but fight amonst themselves (prolly why it's suggested to keep a large group)
Sex Differences: Male has slightly longer anal and dorsal fin rays than the female
It is recommended to keep in a large school due to the habit of shredding other fishes fins. Not recommended to keep with any fish with long flowing fins as these fish can shred an adult angel fish's fins in a matter of a few hours.
I would imagine they could be kept with cichlids of a more peaceful nature, but make sure they can't fit these little beasties in their mouth.
Definitely a fish worth trying your hand at. It has even raised my interest.
Don't know if this has helped, but hope so.
Larry