NorthFin Fry Starter Formula Premium Fish Food. NorthFin’s Fry Starter is pure 100% Whole Antarctic Krill Meal made into a 250-micron powder which allows the fry fish to easily eat the food. Antarctic krill is one of the best quality protein sources available, especially when it comes to fry fish who require a lot of digestible protein for a great start on life. Size : 250 microns Type : Slow sinking powder Recommended for : All types of fry and small fish Available Size: 50 g