Luke - your fish pictured is def a male. The head and stocky body is a dead giveaway. Look at his mouth how it curves up more then a female.
The mouth is not necessarily a male/female thing. It's a lineage thing. I've had females with that mouth.
Luke- I think it's a male too.
And the stripes are normal. When a the fish is not stressed, and the lines are there, it means it's a female.