A multi-ingredient flake food with added egg yolk, recommended as a supplementary food for most aquarium fish. A high content of easily-assimilable protein and lecithin from egg yolk, as well as vitamins and trace elements, stimulates growth, development and spawning. Hence OVO-VIT is a valuable dietary supplement for egg-layer breeding stock, and for juvenile and sub-adult fish. It is also recommended for fish which have undergone medical treatment and need special care and high-energy, easily-assimilable food. It is a source of not only valuable lecithin but also unsaturated fatty acids and natural carotenoids that enhance coloration.