One of the ways Tilapines differ from new world cichlids, is the tilapia spot, in the posterior of the dorsal.
In older tilapines it almost disappears, but in the OPs 2nd pic it is slightly visible.
In young Tilapines (African, and Asian cichlids) it is obvious.
In the same older Tilapines, it appears during stress, but most of the time is washed out.
Same fish below, but older.
It is visible and obvious in some other Tilape lineage species, when spawning, like the Coptodon bythobates below, an African from lake Bermin.
It is very seldom in seen new world cichlids, like this young individual of the Geophagus braziliensus group