That’s not much of sail compared to other dinosaurs.
More like a hump.
Right, Yale Peabody Museum mural, “Age of Reptiles:”https://www.bing.com/images/search?q=the+age+of+reptiles+mural&view=detailv2&&id=ACA4C5D15113587300E95572808F711D10D09D9A&selectedIndex=12&ccid=2Nj%2fZG%2br&simid=608055013596203543&thid=OIP.Md8d8ff646fab723a4c44b6f5dc0f03c9o0&ajaxhist=0