Hump is sexually related, yes, but it is also very much dependent on diet. I do see a slight squaring of the forehead, which is usually a small or early stage hump. Vent picture is blurry, but looks male to me, as does the color. Females don't usually have such a broad orange border on the caudal as males do.
look at the anal fins on your pic compared to the 2nd lot of pics of a female GT.
males like your have loads more colour on them and are pointed.
males are brighter in colour to, female like the 2nd pic are slightly duller.
im 99% sure you have a male.
if you dont plan to breed, dont worry on sex just enjoy your nice lookin fish. :thumb:
That is a male. Some males will not develope a defined hump until they are larger, and some not at all. The enlongated forehead, where a bump could grow is male trait. Females have stubbier heads. But the long, flowing fins, and bright colors are also a good sign of a male. And it is a good looking fish.
(Not all cichlids follow this rule--like Convicts for e.g.)
It's hard to vent substrate spawners b/c the hole is smaller (which I know doesn't help you).
I say male (pointed fins) and by the shape of the vent (though it's a bit fuzzy). The nuchal (forehead bump) should show up soon. Usually, you can expect it anywhere 3-4" long. But it depends on the fish.
Now, my GT is very colorful, lots of red on dorsal and tail, and she's female. We breed for color remember, so don't go by that. IME, females tend to have a more obvious center spot (but that's just a trend I've seen, not an indicator).
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