Carpentis/Texas Gender Please!

[Fishtanking]

First post here & hoping for a bit of help if possible please!

Picked this fish up today my local shop had it advertised as a Texas cichlid but i’m thinking its a carpintis?

Also the shopkeeper was pretty confident it’s a male but without venting i’m not sure, can anyone confirm?

He’s in a 7ft narrow on his own the plan was to grow him out & introduce a female KKP/mammon for breeding SRTs as a project as they’re hard to come by in the UK and shipping makes it too expensive but if hes not a true carpentis/male i’ll change my plans. Any feedback on breeding SRTs would be great although theres a ton of posts here already i’m going to work through haha.

 

[duanes]

At maturity, females will sport a dark area in the dorsal fin, and their geral shape is streamlined compared to males

A mature female in spawning dress left, imature female middle, mature female in normal color right.
Below male

Male normal color left, spawning dress middle, and right.
Note the higher cranial profile of the males
Even at a young age the male profile is apparent, these are onlky @ 1 ".. female right, male left in the pic helow

Spawning pair below, note how when spawning color patterns become similar

 

[duanes]

There are many locatioin varients of H carpintus
The ones above are from " Lago Chairel" a slight brackish Lagoon area on the coast, near Veracruz
below H tamosopoensis found in the Rio Tamasopo near San Luis Potosi