The second and third teeth on each side were noticeably larger than the rest of the teeth in the premaxilla, creating a space between them and the large teeth in the anterior maxilla;

• 颅骨的构造类似重爪龙，牙齿相对比较少，棘龙可能有猎食鱼类的习性，甚至猎食其他恐龙。