You should aim to improve or replace this parts, not mimic it.
Ask yourself: why are they sampling those fishes? Most probably just to take two measures: Weight and size. Age is known and fixed so if you know the three values, you can use conversion grow tables to know if the fish is growing well or not. Measure and weight an object without touching it directly is yet a solved problem. Clove oil lasts only for a while so being faster than a human should be also an objective. Reducing the human exposure to cold with automated work is also a desired goal.
But sampling all the fishes or 60% of them shouldn't be necessarily your main objective, because statistical benefits and cons are unbalanced with a biggest sample. You just would skyrocket the risk for having a few decimals extra of precision. Small sample here is a feature, not a bug.
Ask yourself: why are they sampling those fishes? Most probably just to take two measures: Weight and size. Age is known and fixed so if you know the three values, you can use conversion grow tables to know if the fish is growing well or not. Measure and weight an object without touching it directly is yet a solved problem. Clove oil lasts only for a while so being faster than a human should be also an objective. Reducing the human exposure to cold with automated work is also a desired goal.
But sampling all the fishes or 60% of them shouldn't be necessarily your main objective, because statistical benefits and cons are unbalanced with a biggest sample. You just would skyrocket the risk for having a few decimals extra of precision. Small sample here is a feature, not a bug.