My point in that long ramble was: shrimp don't really hang out in schools 'out in the open ocean'. You have a mistaken picture of how this works.
Shrimp like to congregate in harbors and river mouths, or in relative shelter, as I illustrated above: Near the coast, basically. In my childhood, we were catching baby shrimp, that hung out where human babies also happened to like to swim safely, in slightly warmer water.
My point in that long ramble was: shrimp don't really hang out in schools 'out in the open ocean'. You have a mistaken picture of how this works.
Shrimp like to congregate in harbors and river mouths, or in relative shelter, as I illustrated above: Near the coast, basically. In my childhood, we were catching baby shrimp, that hung out where human babies also happened to like to swim safely, in slightly warmer water.