Sea urchins are members of the phylum Echinodermata, which also includes starfish, sea cucumbers, sand dollars, brittle stars, and crinoids. Like other echinoderms, they have five-fold …

Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, …

Echinus is a genus of sea urchins. Sea urchins are echinoderms that are typically spherical or flattened with a covering of spine-like structures. Sea urchins tend to be important members of …

Jan 11, 2025 · Sea urchins, or simply urchins, are globular echinoderms of the phylum Echinodermata (consisting of starfish, sea cucumbers, sand dollars, brittle stars, and crinoids), …

May 27, 2024 · A sea urchin is a small marine animal in the Echinodermata phylum that is spherical in shape and covered in spines or cilia. There are 950 species of sea urchins. Some …

May 11, 2023 · Sea urchins are spiny, globe-shaped creatures found in oceans worldwide. There are over 950 species of sea urchins, which vary in size, color, and shape. In this essay, we will …

Sea urchins are typically viewed as spiky, black, spherical creatures. However, many may be surprised to discover this animal group's immense variety. Characterized by vibrant hues, …

Sea urchins are globular, spiny sea creatures that make up the class Echinoidea. There are around 950 species of sea urchin, and they inhabit the seabed of every ocean and every …

Sea urchins belong to the phylum Echinodermata - a phylum which also includes sea stars, brittle stars, and sea cucumbers. Most notably, this means, like all echinoderms, sea urchins have …

Sea urchins are classified into six families based on the sculpturing and details of their test, and the details of their pedicellariae. In Echinidae, each valve of the pedicellariae has a poison sac …