Like other mosasaurs, Halisaurus has extra teeth called pterygoid teeth, that it uses to hold on to its prey while its jaw moves forward to swallow the hapless victim whole.

• 和其他沧龙一样。大洋龙有被称之为翼状牙齿的特别牙齿，当大洋龙的下颚吞食倒霉的猎物时，这种特别的牙齿就能大显身手了。