Keen Smell. The megalosaurus has advantage on Wisdom (Perception) checks that rely on smell.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 7 (1d12 + 3)piercing damage, and the target is grappled (escape DC 12). Until this grapple ends, the target is restrained, and the megalosaurus can't bite another target.