visually sexing bass- long story short, anal pore is unreliable
http://www.wmi.org/multi_boards/doc.asp?message_number=2836&ini=d:%5Casp_ini%5Cmb_5.ini
practical field methods of sexing largemouth bass- i don’t like the method, but it’s a pretty scientific paper. maybe you can make heads or tails of a real way that doesn’t involve bassrape.
https://www.researchgate.net/publication/233290784_Practical_Field_Methods_of_Sexing_Largemouth_Bass
pond boss magazine sexing thread- real good info with pics on sexing bluegill and another link to thread on both bg and lmb
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=258505
yak-fish-camp 