👉 In biology, a subphylum is a group of organisms that share similar characteristics and are related to each other. These groups do not have a parent or common ancestor, but instead, they can be defined based on their shared characteristics. Subphyla are typically divided into four main categories: Cnidaria, Annelida, Chordata (vertebrates), and Phylum. Cnidarians are the largest group of animals in the phylum, which includes a wide range of creatures such