A tarantula can survive two years without food. Tarantulas can go much longer without food compared to water. So long as there is water available, a tarantula will not suffer any bad side effects from starvation.
100 Mind-Blowing Starvation Facts
Human meat is rich in protein. However, early cannibalism was not practised because of diet or starvation. Historical instances of human meat consumption were mainly symbolic or religious gestures.