Dr. Skomal says that great whites are not interested in human fodder. People are not as blubbery as a seal or the carcass of a whale, which is their top menu choice. A great white in 2012 took what Dr. Skomal called a “test bite” out of a tourist from Denver who had been swimming near seals in Truro, but it swam away after the man kicked it. It was the first great white attack on a human in Massachusetts in 76 years.