Are Haitiensis cichlid very slow growing?

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I've actually noticed 2 of my haitiensis have paired up, dug a pit and started guarding it, only thing is I think there both males lol I know one forsure is a male because of his hump, but the other has a smaller hump and it could be male or female, can females have slight humps?
 
Okay if that's the case then I think a pair formed, here's a very bad pic of who I think the male is

20200730_174303.jpg
 
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