I often get questions about mixing Danios of different species in the same tank together. As a general rule, if the fish are close to the same size and temperament, there are no problems keeping them together.
There are exceptions to this in regards to the fish cross breeding. With this in mind, the fish I would NOT keep together are;
- Zebra Danios (Danio rerio) and Leopard Danios (Danio rerio var. frankei)
- Celestial Pearl Danios (Danio margaritatus) and Emerald Dwarf Rasboras (Danio erythromicron)
- Danio kyathit – There is a Spotted variety & a Striped variety.