If you change mesh and escape sizes you retain, and stress, more Dungies. I think, based on where they keep being found, that they will tend to be in shallower water. Also, while they ay have been in the state since at least the 60s I think that environmental conditions have changed recently plus they may have evolved better adaptations to local water. Darwin does work.

It may also be that a high abundance of Red Rocks and Dungies and maybe some crab eating birds and fish kept a lid on them. As we remove the predators the prey flourishes.