exodon breeding

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The fish has been bred in captivity at 2 1/2 inches. Females are broader and heavier than the male. Males have a slightly longer anal and dorsal fin rays than the females. The dorsal, anal, and pelvic fins are reddish, adipose yellow, caudal yellowish basally, lobes pink; back brownish, silvery ventrally, tinted yellowish. The female is generally yellowish.
The species was first bred in captivity in 1955 by a 17 year old named Martha Tutwiler.
According to Tutwiler, breeding this species is difficult, because of the fast swimming nature of the species. They were fed live foods and were constantly eating. The species are fin-nippers and recommended no other species be kept with them. The spawning took place in a ten gallon aquarium densely filled with artificial spawning grass (Spanish moss). There were only two inches of clear water above the plants. The breeders swam back and forth releasing eggs and eating them as they fell. Miss Tutwiler, assumed that if they had been provided a larger aquarium she would have been able to save more of the eggs. The fry hatched from the eggs in about 48 hours at 74°F. Breeders must be removed after spawning.
- Copyright© 1994-2009 Oregon Piranha Exotic Fish Exhibit,

That's from a profile on them - I didn't write it and I'd give the author credit if his name had been listed.

From my own experience: I've owned a shoal of them and I cant imagine doing it. It the very least it would be very hard. Kept in a group they are so aggressive in their search for food any eggs would be almost immediately eaten. Kept as a male-female pair they'd kill each other not mate.
 
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