Dumb question as I am not a fisherman... What good would be taking home the fish and throwing them away vs throwing them back and allowing the fish and crabs eat them. :shrug:
A lot of fisherman cull..
THey'll catch their limit, then catch more and as they catch bigger fish throw the little ones back, and they die. So you lose their limit PLUS all the fish they culled.
Limit them to the first five (or so) fish caught regardless of size, make the culling part ilegal, and at the most you can only lose a fishermans limit every day. You could cut the loss or harvest of fish by more than 50%.
Of course is it enforceable.. NO.. If they cull, Fish and Game stop the boat, and you have your limit on board, how can they prove those weren't the only fish you caught? How can they tell if the five fish on board were the first five you caught, of the last five of the 25 you caught? No way of telling, another unenforceable law.
The only way one could be caught is if Fish and Game actually saw you actively culling your catch.