our shrimp tend to head to the light at night in most spots locally when the water chills
dont pay them much attention here though as it is mostly small fish with them .
our shad spawn more than once a cycle ,so it is a crap shoot as to what size shad they are eating .
seen shad 3.5 inches long dead in the winter and shad 1 inch long dead in the winter water .
good read none the less and in the end , the fish you posted the other day looked really spawned up if it was fresh out of the water when you captured the image , somewhat worked tail and heavy color tells me it likely went shallow recently if it came out of the water looking like that .
in your part of the world it would be safe to assume pre spawn is well under way ,our black crappie will move up next month and we are far colder water here .
might think about short water spawn areas at first light after a few real warm days
you will beat the crowd and quite possibly hit a huge fish as the older fish often move up first in many cases .
just a thought my friend