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As soon as the yolk-sacs of the alevins are absorbed the little fish cease to be alevins, and are called "fry." The alevin stage was that in which the fish give least trouble, the stage I am now describing is that in which they give most. They must be fed frequently at least four times a day.
A greatly varying period of time having elapsed and the yolk-sacs of the alevins being nearly absorbed, the fish culturist will see that some of the little fish begin to leave the pack at the bottom of the tray, and to swim up against the current. When this is observed some very finely divided food should be offered to these alevins.
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