Starfish Essay, Research Paper
The common name for the starfish is the sea star. There are an estimated
1500 living species of these marine animals characterized by having no back
bone (invertebrate) and having arms which are all around the body with
locomotery tubed feet.
Generally starfish are rather stiff bodied animals that crawl slowly accorded
the bottom of the ocean floor. Their mouth is directly under them . They
have arms radiating all around them, each arm has many rows of tube feet
used for crawling, attachment, and eating. Their arm length varies, as well as
the number of arms. They could have as little as four all the way to as many
as fifty they usually have no anus if they do have one it is on the top of their
body structure. Their skin is rough and leathery, it usually has spines or
spikes of some sort. The animal has a large gut, a complex system of body
cavities, and a simple brain less nervous system.
Starfish are found at the bottom of the ocean. They play an important role in
the communities, because they eat a variety materials and are often
numerous. Some are pests to the oyster beds. Sometimes some species of
starfish have population explosions that damage coral reefs through over
feeding on the coral. Some adult animals feed on starfish but they don’t taste
very well nor are they nutritious.
Scientific Classification, Starfish belong to the phylum Echinodermata. They
constitute the class Asteroidea
The star fish is the most un common animal in the marine aquariums and The
marin biologists are not fastinated by the animals in the marine world
.
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