No, sharks do not have necks in the way that humans or many other animals do. Sharks belong to a group of fishes known as elasmobranchs, which also includes rays and skates. Their bodies are structured quite differently from those of land animals.
In vertebrates with necks, such as mammals, the neck allows for a range of movement and the ability to support the head. Sharks, however, have a large head that is directly connected to their body without a distinct neck structure. The way their spine is constructed, with a flexible combination of cartilage and muscle, allows them to move their heads side to side and up and down, but it does not include a traditional neck.
This anatomical difference is an adaptation to their aquatic environment, where streamlined bodies are essential for effective swimming. So, while sharks can certainly move their heads in various directions, they do not possess necks as seen in many terrestrial animals.