How to ID Male vs Female Walleyes?

[frogmaster]

I know this title is wide open for many jokes and I too love jokes .

Seriously,

I had been told by many respected walleye peers that:

1. You can not tell males from females visually unless they are discharging either eggs or semen.

2. The Belly Bulge can be misleading.

3. Spawning Females are not ready to spawn until 24" or greater.

SO... I have a self imposed size limit or keeping no walleyes greater than 23.75" and still follow local regulations too.

Can you TRUELY tell the difference without any discharge?

Willing to learn

TY