The silver cyprinid (Rastrineobola argentea) also known as the Lake Victoria sardine, mukene, and omena (native language), dagaa (Swahili) is a species of pelagic, freshwater ray-finned fish in the danio family, Danionidae from East Africa.

A small silvery fish which has a strongly compressed body covered in large scales[3] with a pearlescent sheen and a yellow tail, and can grow to a length of 9 cm (3.5 in).

[1] The silver cyprinid has a lake-wide distribution covering both inshore and offshore in Lake Victoria.

In Lake Kyoga this species is found in open water apparently avoiding the water-lily swamps and it is normally caught in turbulent areas of the Victoria Nile.

In the mid-morning the parasitised fish have a tendency to move towards the shoreline, especially where there are sandy beaches, to search for food.

[7] The fish is caught during moonless nights and in the morning it is sold to women who spread it out for drying in the sun.

A major wholesale market for dried dagaa is in Mwanza, Tanzania, and Kisumu Kenya, from where it is transported all over eastern and southern Africa for use as food or chicken feed.