Development
Fertile Harlequin Rasbora eggs require approximately 18 hours to hatch at a temperature of 28°C. Upon hatching, the fry are translucent, around 3 to 4 millimetres long, and remain attached to the leaf upon which the eggs were laid for a further 12 to 24 hours, during which the yolk sac is absorbed. Once this process is completed, the fishes become free-swimming, and at this stage, require very fine sizes of food such as live infusoria for a period of 7 to 14 days, after which the fry are able to feed upon newly hatched Brine Shrimp. If infusoria are unavailable, commercial prepared foods for egglayer fry may also be used.
The Harlequin Rasbora takes approximately 8 to 10 weeks for the fry to assume full adult colouration.
Read more about this topic: Harlequin Rasbora
Famous quotes containing the word development:
“Fascism, the more it considers and observes the future and the development of humanity, quite apart from political considerations of the moment, believes neither in the possibility nor the utility of perpetual peace.”
—Benito Mussolini (1883–1945)
“For the child whose impulsiveness is indulged, who retains his primitive-discharge mechanisms, is not only an ill-behaved child but a child whose intellectual development is slowed down. No matter how well he is endowed intellectually, if direct action and immediate gratification are the guiding principles of his behavior, there will be less incentive to develop the higher mental processes, to reason, to employ the imagination creatively. . . .”
—Selma H. Fraiberg (20th century)
“Sleep hath its own world,
And a wide realm of wild reality.
And dreams in their development have breath,
And tears, and tortures, and the touch of joy.”
—George Gordon Noel Byron (1788–1824)