The present invention relates to a kind of devices; for protecting farm fish and shellfish from material of swimming; with for protecting the farm fish and shellfish; use the device; the huge data volume processing cost that can be prevented and loss, due to the dead fish on farm and shellfish, can protect farm fish and shellfish safely to pass through separation buoyant includes red algae; oily band and various impurity are from above-mentioned farm fish and shellfish. ;The 2014 of copyright KIPO submissions
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