Why do sharks swim alone and not in a group?

This is a misconception; some shark species are known to form groups, shoals, schools, or pods, depending on the term preferred when referring to fish aggregations. For example, the dusky shark Carcharhinus obscurus forms groups while migrating, and the scalloped hammerhead Sphyrna lewini travels in schools when migrating or hunting in open waters. Other species that are usually observed alone or in pairs (like the great white shark Carcharodon carcharias) do associate in larger numbers occasionally for specific reasons as well