The Diamond (Neon) Dwarf Rainbow fish is an intelligent, beautiful and – if kept properly – active and happy fish. They are very smart and even seem to be aware of things going on outside the tank. It is quite an easy fish to take care of, but keep in mind that they are quite sensitive to water condition changes. And although they are small fish, they still need a decent sized tank, because they do best in groups of 8 or more. What do you think of this beauty?