Radular teeth of molluscs, with their extraordinary functional differentiation, represent the pinnacle of sophisticated integration of form and function across the scales, shaped by millions of years of meticulous evolutionary refinement. In this paper, we reviewed their astonishingly diverse morphologies, material compositions, and biomechanical properties that provide a treasure trove of knowledge that can be applied to biomimetic innovation. In the recent literature, researchers studied the radula’s structural intelligence and its exceptional optimization for strength, flexibility, and efficiency, which could lead to the design of prototypes of advanced materials and tools with durability, precision, and adaptability—particularly at the micro- and nanoscale. This exploration into the form and function of radular teeth offers transformative directions for future advancements in biomimetic engineering, contributing to the development of revolutionary solutions across diverse industries.