On a full moon back in the 1980’s in Ecuador the habit of carniverous stylirostris to invert and prey on insects caught in the surface water tension (moons reflection) was recorded while vannamei kept swimming subsurface.
Stomach analysis showed that vannamei not an insect eater but grazes on algae and zooplancton. While styli was into the insect grub.
Underwater lights were explored.
Not so sure – insects grown for growing shrimp (distant arthropod cousins) while insects grown for directly feeding humans may be better path to follow.
Cannot speak for fish though…