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Sea Stars

Sea Stars. Class Asteroidea Earn their name from their star-like shapes of their bodies. Some are yellow or tan, but others are bright shades of blue, green, red, orange, or purple. The mouth is in the center disk and faces downward toward the substrate- called the oral surface.

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Sea Stars

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  1. Sea Stars • Class Asteroidea • Earn their name from their star-like shapes of their bodies. • Some are yellow or tan, but others are bright shades of blue, green, red, orange, or purple.

  2. The mouth is in the center disk and faces downward toward the substrate- called the oral surface. • There are nearly 2000 different species of sea stars that have been discovered. • Most sea stars take mollusks as their favorite food, but some eat sea urchins, sea cucumbers, and other sea stars.

  3. Their water-vascular system serves in locomotion. • They are never found in fresh water or on land. • Sea Stars are strictly bottom animals.

  4. At the end of each arm, a star has one or more tube-feet. • A sea star’s arms are actually part of it’s body rather than appendages. • Most cannot move very quickly.

  5. The Pacific Northwest is home to more than 70 species found nowhere else in the world. • Some live in mud, sand, and silt land on their bodies. • Some live in sea grass in the Gulf of Mexico, Florida Keys and Carribean Sea.

  6. In the Florida Keys sea stars are collected and dried to be sold as souvenirs. • Their size is less than 1/2 an inch in diameter to more than 3 feet across. • The largest sea star of the Atlantic Coast of America is Oreaster Reticulus of Florida.

  7. Sources • The Lower Animals Living Vertebrates of the World. By; Ralph Buschsbaum and Lones J. Mine. Pgs.189,254,276,280

  8. BY: VERONICA FOLEY PERIOD 2

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