Starfish Starfish Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or "basket stars". About 1,500 species of starfish occur on the seabed in all the world's oceans, from the tropics to frigid polar waters. They are found from the intertidal zone down to abyssal depths, below the surface. Starfish are marine invertebrates. They typically have a central disc and five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth,
Spiny mouse Spiny mouse The term spiny mouse refers to any species of rodent within the genus Acomys. Similar in appearance to mice of the genus "Mus", spiny mice are small mammals with bare, scaled tails. However, their coats are endowed with unusually stiff guard hairs similar to the spines of a hedgehog; this trait is the source of the common name, "spiny mouse". Despite their similarity to members of the genus "Mus", genetic evidence suggests that the African spiny mice may be more closely related to gerbils than to common mice. Genus Acomys - spiny mice Though African spiny mice originated