I'm going to say no but I could be wrong. I don't think hartwegi is one of the species that typically grows a large nuchal hump but again, I could be wrong. there's also an aweful lot of red all over the body and most of the vieja/paratheraps that have read have it only around the head area. I'd say that fish looks flowerhornish but let's see what some others have to say.
To be honest i have never seen a hartwegi that looks like that. the nucal hump is very big, it may well have hartwegi in it but i reckon its a kind of flower horn, nice fish all the same though.
Definatly NOT a Hartwegi.
Thats a flowerhorn for sure.
You can tell with the black markings along the side.
I hate FH's, But that has a massive hump, Which Im sure would be liked in the FH community.