#sea-urchin
nature_people What is the difference between a sea cucumber and a sea urchin?
Sea cucumbers and sea urchins are both marine animals belonging to the phylum Echinodermata, but they differ in several ways, including their... Read more
waves How do sea urchins defend themselves?
Sea urchins have several defense mechanisms to protect themselves from predators. Their primary defense is their spines, which can be used to deter... Read more