I shocked 10s of 1,000s of those in oxbow lakes in mississippi, somtimes as many as 500 in a 15 minute shock run. I never saw one over 4 inches. They are extremely tolerant of low DO and "dirty water" in general, which was probably one of the reasons they were so dominant in those 2 foot deep, extremely nutrient rich lakes.

Every person should have an interest in life - I think I'll go fishing. ~ Thoreau