<p>Celestial pearl danios AKA Galaxy Rasbora. (Celestichthys margaritatus) are smallish, brightly colored cyprinids that are native to South-east Asian waters. They do not exhibit any form of aggressive behavior, and they love to swim about in a shoal.</p> <p>They can only grow to a maximum length of about 2.5cm which makes a nano tank ideal for them. They thrive in a tank with a slow flow rate, and their tank should be equipped with plants and other items that make up their hiding spots.</p> <p>They may be small, but they are never inconsequential within the aquarium. For one, they are pretty colorful and very active. So, there isn’t a dull moment with them in the tank.</p>