Care
This tiny but absolutely stunning shoaling species took the fishkeeping world by storm in early 2007. Originating from small ponds heaving with dense aquatic vegetation, Danio margaritatus is found in shallow areas up to 30cm in depth. Ideally, this is a species that will be maintained in groups of 10 or more in the home aquarium, not only for the fish to feel secure, but also to further the chances of breeding. Larger groups will also help to disperse any minor territorial squabbles between the males and this can be further aided by the inclusion of dense planting for the recipient to retreat into if needed. This fish should either be kept in a species-only aquarium, or else with other small, peaceful fish species only. Try to keep 2 or 3 females to every male. It may be of interest that the recently discovered, and as yet undescribed, beautiful little Rosy Loach (Petruichthys sp.) was found to be living alongside D. margaritatus in the wild.
Due to the sudden frenzied collection of D. margaritatus immediately following its introduction to the hobby, substantial damage occurred to much of its natural habitat and measures were put in place to protect wild fish and their environment, although it's now known to be more widely distributed than originally feared. Tank bred specimens are now providing all of the stock seen in stores. May also be referred to as C.P.D, Fireworks 'Rasbora' or Galaxy 'Rasbora'.
Feeding
Small frozen foods such as baby brineshrimp, cyclops, and daphnia, plus crushed flake and micropellets.
Breeding
Best results are obtained with a small bare-bottomed spawning tank covered with copious amounts of Java moss (Taxiphyllum barbieri) and the addition of a well-conditioned single male and female (additional males will predate on the eggs). These fish are known to spawn in pairs, with around 30 non-adhesive eggs being produced per couple. The parents may try to consume the eggs, a good reason to use profuse amounts of moss in the tank or even use some form of separating grid underneath so that the fertilised eggs can fall to safety. The eggs should hatch after 72 hours and the fry should become free-swimming 48-72 hours later, although these times will be affected by water temperature. The fry can be fed on infusoria, microworm, fine "egg-layer" powdered first foods or liquids, moving on to baby brineshrimp etc. It is not unusual to see this species spawning every 48 hours or so.
