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Sea Stars Sea stars, or starfishes, or starfish are echinoderms, which means spiny-skinned. They are a very strange group of animals!

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Presentation on theme: "Sea Stars Sea stars, or starfishes, or starfish are echinoderms, which means spiny-skinned. They are a very strange group of animals!"— Presentation transcript:

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2 Sea Stars Sea stars, or starfishes, or starfish are echinoderms, which means spiny-skinned. They are a very strange group of animals!

3 Sea Stars Unlike most advanced animals which are bilateral, echinoderms show radial symmetry as adults. This means they have no head and no tail.

4 Sea Stars The most distinctive structure of an echinoderm is an elaborate water- pumping system which operates its tube feet.

5 Sea Stars At the center of their bottom or oral side is their mouth. They like to feed on such things as clams and oysters.

6 Sea Stars Sea stars lack a brain, but they have two stomachs! One for digestion and the other stomach can be extended outward to engulf and digest prey.

7 Sea Stars Sea stars are known for their ability to regenerate lost arms. Their ability to regenerate depends on the species.

8 Sea Stars In some types, a new sea star may be regenerated from a single arm attached to a portion of the central disk.

9 Sea Stars Sea stars tend to found in the saltier waters near the mouth of the bay and the ocean inlets where other echinoderms are found.

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11 Crown-of-Thorns can impact a reef

12 The Pacific Sunflower star can reach about 5 feet in diameter.


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