Snrub Here are some mouth gape measurements for green sunfish that I have collected. There may be some variation in size based on how much one spreads open the mouth for the measurement. I open the mouth fully but do not overly stretch it. Measurements are in inches and a horizontal gape inches(mm). 8.0"= 1.29"(33mm), 7.0" =1.06"(27), 6.5"= 0.99"(25), 6.25"= 0.94"(24), 6.0"= 0.9"(23-24mm), 5.5"= 0.86"(22).
There could easily be some variation of mouth size with GSF populations in various parts of the country, however I would not expect the variation to be significant for individuals in the same species. I would expect the most of the variation to be due to different methods one uses for making the measurement. Mouth measurements closest to those above would IMO indicate the fish has a high percentage of GSF genetics.
Last edited by Bill Cody; 08/08/15 09:47 AM.
