👉 "Notacanthoid" is a term that refers to an organism that lacks one or more of its main body parts, such as the nose. This can occur in various organisms, including insects and some plants. Notacanthoids are characterized by having no ears, which is unusual for most animals. They also lack a mouth, eyes, and other structures needed for breathing, digestion, and locomotion. Instead, they rely on specialized organs called "notacanths" to provide these