Joseph Stalin Dan Aykroyd Ashton Kutcher and Daffy Duck all have syndactyly What is this?

Syndactyly is a congenital condition characterized by the fusion or webbing of two or more fingers or toes. This condition can vary in severity, affecting the skin, bones, or both. While Joseph Stalin, Dan Aykroyd, Ashton Kutcher, and Daffy Duck are notable figures or characters, their association with syndactyly highlights the diversity of individuals who may have this condition, whether real or fictional.