After a month, specimens are approximately a half-inch ( 1 cm) or
more. At this point, it is best to move them to a separate aquarium
to improve development. They should be given 16 hours of light
and three feedings per day, with frequent siphoning and periodic
25-percent water changes. At three months of age, their average
size reaches nearly an inch ( 2 cm), and at six months, 1½ inches ( 4
cm), an optimal stage at which to separate them into small groups.
Sexual maturity is reached by the seventh or eighth month,
along with the formation of couples and the realization of the first
spawns. By that time, the most developed specimens exceed 2
inches ( 5 cm). Young J. ornatus continue to grow until they reach
one year of age, at which point they will have attained a size of
around 2½ inches ( 6. 5 cm). D
J. ornatus fry at 10 weeks’ development.
Newly hatched J. ornatus larvae.