yea he will eat by about the 3rd day. feed insects, any fish, ect...also research and find what they eat and where they live and what kind of enviornments suit them best. just try to match the enviornment he lived with some species of fish he lived with so he would not be confused about eating. if you never heard or saw of sushi before, would you eat it? im probobly guessing no which would be the same thig he would do.