Like all danios, the 2.5 inch. Pearl danio is full of energy, usually flashing about in the tank as if full of the joys of living. The mother-of-pearl body scintillates with every twist of the body, reflecting delicate pastel shades of pink, blue and green, per fectly blended, and small hair-like barbels hang from the lower lip, which is characteristic of the carps.
Sexing isn’t simple at initial glance, but with just a little practice you’ll find it is not too challenging. The body of the female is deeper and slightly longer, and this becomes much more noticeable as she fills with spawn.
Whenever you are breeding pearl danios, the greatest difficulty would be to stop the eggs being eaten, as the danios have a strong tendency to eat their eggs as they fall. To stop this; water should not be any deeper than 4 inch, along with a trap which prevents the parents from getting at the eggs should be installed. The trap can take the form of 0.25 inch. diameter glass marbles spread over the floor of the tank, and if no sand is utilized a glance up via the bottom of the tank will show you if a spawning has taken place. Marbles smaller than 0.25 inch diameter should not be utilized, as frightened fish, diving among them occasionally gets wedged.
An additional form of trap, preferable to marbles, is glass or Perspex bars wired together with soft lead wire to form a frame which you are able to raise about an inch off the bottom, and so leave lots of room for inspection.
Sexes should be separated a week prior to breeding. Introduce the female a day prior to the male. A higher percentage of fertility will probably be maintained if 3 males are utilized to one female. If, nevertheless, the female appears to be worried by too a lot attention, it is advisable to remove one male and leave only two.
The breeding temperature should be between 72°-77°F. The eggs are non-adhesive and hatch in two days, and also the average number of eggs per spawning is 200.