Males only use one hemi pene to lock a female. Males are generally smaller than females and could never/rarely have both hemi penes in a female at once due to the spacing differences between the male's hemi penes and the female. This is how 500g males lock 2500g females (using only one pene).
Now.... depending on if this guy had his "dominant" pene removed will probably determine his ability to breed. He may be able to switch over, but I have observed all our males lock with their dominant pene 100% of the time.
Pop your male after removing him from a females tub after a visual lock. The pene he locked with will be larger, purple and will not have a sperm plug on it. This is a good tip if you did not observe a lock to conclude if your male "may" have locked a female and you did not see it.
Just unpaired a few males this morning that I observed visual locks with last night. I'll see if I can post a video of a males hemi penes to show the difference.
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