muzzlebreak, if it had half developed eggs right now then those are being re-absorbed from not being able to spawn last year or the year before. All of them don't find mates or get rejected unless the males think they're suitable and usually all females under 15 lbs won't ever lay her eggs. Also it's the male of the catfish species that are the large ones. Mature male channelcat this time of year will be bluer than bluecat too ... if the channelcat is green then it's a female ... the smaller males 2 to 3 lbs might not be fully turned to blue like the mature males but their whiskers and around their mouth and fins will be blue. Once they get up to about 6 lbs then all male channelcat will be a new bluejean colored blue during the spawn. So if you're calling them males just because they don't have eggs in them they may have already layed their eggs and the egg sacks will be barely detectable.
Nope. I know a blue from a channel and also a male when I clean it from its milt organ.
I also know how to look at the anal fin and tell the difference. I been catching Blues and channels nigh on 60 years now.