Best saltwater fish care tips? Danios is also a small fish that adapts easily to any kind of tank water environment. They originated from Asian swamps which makes them tough and able to withstand different conditions. They are very playful and love to chase their fellow fishes. They are happy with fish flakes or fish pellets, but they should also be given tubifex worms, brine shrimps, or bloodworms from time to time. Having a lifespan of 5 years, Neon Tetras grow to be only 1.5 inches. They are generally a peaceful breed; they can live in a community tank but …