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Word Count: 258
The common name for the starfish is the sea star There are an estimated1500 living species of these marine animals characterized by having no backbone invertebrate and having arms which are all around the body withGenerally starfish are rather stiff bodied animals that crawl slowly accordedthe bottom of the ocean floor Their mouth is directly under them Theyhave arms radiating all around them each arm has many rows of tube feetused for crawling attachment and eating Their arm length varies as well asthe number of arms They could have as little as four all the way to as manyas fifty they usually have no anus if they do have one it is on the top of theirbody structure Their skin is rough and leathery it usually has spines orspikes of some sort The animal has a large gut a complex system of bodycavities and a simple brain less nervous systemStarfish are found at the bottom of the ocean They play an important role inthe communities because they eat a variety materials and are oftennumerous Some are pests to the oyster beds Sometimes some species ofstarfish have population explosions that damage coral reefs through overfeeding on the coral Some adult animals feed on starfish but they dont tasteScientific Classification Starfish belong to the phylum Echinodermata TheyThe star fish is the most un common animal in the marine aquariums and Themarin biologists are not fastinated by the animals in the marine world
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