Tiktaalik definitely resolves some of the questions about the evolution of the tetrapod clade. For example, the common ancestor of tetrapods and their closest living relatives had stout, paddle-shaped fins and a neck. As a result, Tiktaalik could be considered a so- called missing link in the evolution of tetrapods. However, missing link is often used incorrectly to describe a direct ancestor between two species or groups, with the expectation that the missing link will explain all the traits the two have in common. Generally, scientists do not go looking for missing links, and they do not expect to find them thanks to the immense diversity of historic life and the extremely low probability of fossilization.