Here's a picture of the microparticulate pellet feed used for feeding the salmon frys during their first feeding period. It is pretty much like powder food if you would like to put it that way. The salmon fry uses their chemo-senses to detect the pellets and will be required to start feeding within a certain period of time after they have exhaust their yolk sac supply. Any fish that fails to do so within that window period will enter into the "point of no-return" and will eventually die off.
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