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Sea Star

Sea Star

Range:
It can be found both on hard and sandy substrate, from the subtidal zone to 1,300 feet.
Characteristics:
Often called starfish, sea stars belong to a group of animals called echinoderms and are not fish at all! Sea stars are in fact related to sea urchins, sea cucumbers and sand dollars. The word echinoderm means “spiny skin.” They share the following characteristics: · An internal skeleton made of little calcium plates, · Five-part symmetry and · A special fluid-filled system called a water vascular system, that operates the tube feet.
Sea Star
Interesting Facts:
With about 1,800 species, sea stars come in a dazzling array of colors and can range in size from a small bug to a large clock. They are found living in all the world's oceans, from tropical habitats to the cold seafloor. The five-arm varieties are the most common, hence their name, but species with as many as 40 arms exist.
Sea Star
Class: Other
Order: Echinodermata
Family: Asterozoa
Genus: Stichastrella
Species: rosea
Length: Up to 8 inches
Where at the Zoo? Rocky Shores


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