Starfish ^help me^

1.Where does starfish live?

2.Who Is their energy?

3.What does it eat?

4.How does it swim/walk?

5.How does it protect itself?

Thanx

3 個解答

評分
  • 匿名
    1 十年前
    最愛解答

    1)Starfish lives in the ocean.

    There are about 1,800 living species of starfish, and they occur in all of the Earth's

    oceans. The greatest variety of starfish is found in the tropical Indo-Pacific. Areas

    known for their great diversity include the tropical-temperate regions around Australia,

    the tropical East Pacific, and the cold-temperate water of the North Pacific (California

    to Alaska). Asterias is a common genus found in European waters and on the eastern

    coast of the United States; Pisaster, along with Dermasterias ("leather star"), are

    usually found on the western coast. Habitats could range from tropical coral reefs,

    kelp forests to deep-sea floor, although none of them live within the water column; all

    species of starfish found are living as benthos. Echinoderms need a delicate internal

    balance in their body; no starfish are found in freshwater environments.

    2)They are cosumers, so they gain the energy from food.

    3) Most species are generalist predators, some eating bivalves like mussels, clams,

    and oysters; or any animal too slow to evade the attack (e.g. dying fish). Some

    species are detritivores, eating decomposed animal and plant material, or organic

    films attached to substrate. The others may consume coral polyps (the best-known

    example for this is the infamous Acanthaster planci), sponges or even suspended

    particles and planktons (starfish from the Order Brisingida). The process of feeding

    or capture may or may not be aided by special parts; Pisaster brevispinus or Short-

    spined Pisaster from the west coast of America may use a set of specialized tube

    feet capable of extending itself deep into the soft substrata, hauling out the prey

    (usually clams) from within.

    4)Starfish move by using a water vascular system. Water comes into the system via the

    madreporite. It is then circulated from the stone canal to the ring canal and into the

    radial canals. The radial canals carry water to the ampullae and provide suction to the

    tube feet. The tube feet latch on to surfaces and move in a wave, with one body

    section attaching to the surfaces as another releases. Most starfish cannot move

    quickly. However, some burrowing species like starfish from genus Astropecten and

    Luidia are quite capable of rapid, creeping motion - it "glides" across the ocean floor.

    This motion results from their pointed tubefeet adapted specially for excavating local

    area of sand.

    5) It protects itself by moving away.

    Also, it is sensitive to danger.

    Although the echinoderms do not have many well-defined sensory inputs, they are

    sensitive to touch, light, temperature, orientation, and the status of water around

    them. The tube feet, spines, and pedicellariae found on starfish are sensitive to

    touch, while eyespots on the ends of the rays are light-sensitive.

    Due to its sensitivity, it can quickly move away from danger.

  • 1 十年前

    1)Starfish lives in the ocean.

    There are about 1,800 living species of starfish, and they occur in all of the Earth's

    oceans. The greatest variety of starfish is found in the tropical Indo-Pacific. Areas

    known for their great diversity include the tropical-temperate regions around Australia,

    the tropical East Pacific, and the cold-temperate water of the North Pacific (California

    to Alaska). Asterias is a common genus found in European waters and on the eastern

    coast of the United States; Pisaster, along with Dermasterias ("leather star"), are

    usually found on the western coast. Habitats could range from tropical coral reefs,

    kelp forests to deep-sea floor, although none of them live within the water column; all

    species of starfish found are living as benthos. Echinoderms need a delicate internal

    balance in their body; no starfish are found in freshwater environments.

    2)They are cosumers, so they gain the energy from food.

    3) Most species are generalist predators, some eating bivalves like mussels, clams,

    and oysters; or any animal too slow to evade the attack (e.g. dying fish). Some

    species are detritivores, eating decomposed animal and plant material, or organic

    films attached to substrate. The others may consume coral polyps (the best-known

    example for this is the infamous Acanthaster planci), sponges or even suspended

    particles and planktons (starfish from the Order Brisingida). The process of feeding

    or capture may or may not be aided by special parts; Pisaster brevispinus or Short-

    spined Pisaster from the west coast of America may use a set of specialized tube

    feet capable of extending itself deep into the soft substrata, hauling out the prey

    (usually clams) from within.

    4)Starfish move by using a water vascular system. Water comes into the system via the

    madreporite. It is then circulated from the stone canal to the ring canal and into the

    radial canals. The radial canals carry water to the ampullae and provide suction to the

    tube feet. The tube feet latch on to surfaces and move in a wave, with one body

    section attaching to the surfaces as another releases. Most starfish cannot move

    quickly. However, some burrowing species like starfish from genus Astropecten and

    Luidia are quite capable of rapid, creeping motion - it "glides&;quot; across the ocean floor.

    This motion results from their pointed tubefeet adapted specially for excavating local

    area of sand.

    5) It protects itself by moving away.

    Also, it is sensitive to danger.

    Although the echinoderms do not have many well-defined sensory inputs, they are

    sensitive to touch, light, temperature, orientation, and the status of water around

    them. The tube feet, spines, and pedicellariae found on starfish are sensitive to

    touch, while eyespots on the ends of the rays are light-sensitive.

    Due to its sensitivity, it can quickly move away from danger.

  • Rayman
    Lv 5
    1 十年前

    1. Bottom of the sea.

    2. ???? What do you means ??? I don't know !! Sorry!!

    3. It eating bivalves like mussels, clams, and oysters; or any animal too slow to evade the attack (e.g. dying fish). Some species are detritivores, eating decomposed animal and plant material, or organic films attached to substrate.

    4. The underside of the starfish is covered with hundreds of tube feet, which it uses for walking around, for attaching tightly to rocks, and for holding on to prey. To move, each tube foot swings like a leg, lifting up and swinging forward, then planting itself on the ground and pushing back. At the tip of each tube foot (in most species) is a suction cup. These aren't used when walking on level ground, but can be used when walking up sheer surfaces.

    5. To protect itself, it burrows into the sand.

    資料來源: me
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