Danube bleak gravel bottoms. The females arrive later and deposit about twenty thousand eggs which stick to stones and gravel. These hatch after two or three days and the larvae stay among the gravel for another ten days before moving to backwaters and shallows where they feed on zooplankton, insect larvae and algae. The juvenile fish migrate down stream in the autumn or the spring of the following year. They may become mature in four to five years. Danube bleak The Danube bleak or Caspian shemaya ("Alburnus chalcoides") is a species of freshwater fish in the family Cyprinidae. It is found in
David B. Bleak being wounded himself, Bleak rushed the Chinese troops multiple times and killed five of them—four using only his hands—before assisting the wounded, and shielding another soldier from a grenade blast. Bleak is credited with saving the patrol's wounded and ensuring that all of its members returned to allied lines. For these actions, he was awarded the Medal of Honor. In the years preceding and following his military service, Bleak worked numerous jobs around Idaho and Wyoming, working as a rancher, dairy farmer, truck driver, and meat cutter before retiring as a radioactive waste technician at the Idaho National Engineering Laboratory.