Yes, that's a good point. For halibut, the larger females produce more eggs, so you want to try to leave those larger females in there. The size and age of halibut have dropped on the west coast, here in Alaska and B.C., but you do want to avoid the big females if you can. A lot of people do want to target a trophy fish in the recreational fishery. Halibut can grow quite big—some of the records are 400 pounds—but it's the bigger females that are more productive in terms of egg laying.
On April 21st, 2015. See this statement in context.