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1) Leave your real name when you post an idea.

2) Have a serious attitude for sharing and learning when you post an idea.

3) Do not post photographs and videos.

4) Use Google Search to find out more about the animal before you choose ONE main idea and type in only ONE fact for that idea (in point form/ in a sentence).

5) Do not worry if you do not see your message posted on this wall as the teacher will need to read it and give her approval before it can appear on the wall.

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Sea urchins mostly eat algae and kelp. However, they can also eat sea cucumbers, sponges and brittle stars.

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Sea urchins are nocturnal. That means that they are more active at night.

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Sea urchins are echinoderms. They have skeletons made up of calcite. The body is ovoid shaped with spines. The upper surface is domed and the underside is flattened. The mouth has structure made up of five calcium carbonate plates.

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sea urchins eat
Kelp
Barnacles
Seaweed
Feather stars
and other crinoids

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The sea urchins behavior

Most species of sea urchins are active nocturnally and moving out of shelters at night to graze

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sea urchins are echinoderns

sea urchins dont have eyes
sea urchins no legs and no ears

and they look like purple porcupines in the sea

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As echinoderms, sea urchins have pentaradial symmetry. Skeleton made of calcite. Typically, the body is ovoid shaped with spines; the upper surface is domed and the underside is flattened. The mouth has a complex structure made up of five calcium carbonate plates.

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Sea urchins are active nocturnally, moving out of shelters at night to graze. This behavior is correlated with the avoidance of visual predators; however, it also increases exposure of predators, including lobsters and asteroids.

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Sea urchins will eat just about anything that floats by. Its sharp teeth can scrape algae off rocks, and grind up plankton, kelp, and sometimes even barnacles and mussels. Sea urchins are sought out as food by birds, sea stars, cod, lobsters, and foxes.

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As echinoderms, sea urchins have pentaradial symmetry. Skeleton made of calcite. Typically, the body is ovoid shaped with spines; the upper surface is domed and the underside is flattened. The mouth has a complex structure made up of five calcium carbonate plates.

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Many species of sea urchins active nocturnal, moving out at night to graze

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Sea urchins will eat just about anything that floats by. Its sharp teeth can scrape algae off rocks, and grind up plankton, kelp, periwinkles, and sometimes even barnacles and mussels

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sea urchins have skeletons made of calcite

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Sea urchins eat algae,periwinkle,kelp and plankton

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Sea urchins move slowly with their tube feet

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Sea urchins body are ovoid shape with spines

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Sea urchins eat plankton, kelp,mussels and algae.

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Sea urchins prefer to reproduce in warmer seasons

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Algae, Plankton, Sponges, Mussels, Kelp, Barnacles and moss

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They can live in any habitat in the sea

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They are found from intertidal to the deep ocean .

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Gwyneth Lim                                                                      As echinoderms, sea urchins have pentaradial symmetry. Skeleton made of calcite. Typically, the body is ovoid shaped with spines and the upper surface is domed and the underside is flattened. The mouth has a complex structure made up of five calcium carbonate plates.

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Gwyneth Lim                                                                      As echinoderms, sea urchins have pentaradial symmetry. Skeleton made of calcite. Typically, the body is ovoid shaped with spines and the upper surface is domed and the underside is flattened. The mouth has a complex structure made up of five calcium carbonate plates.

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Sea urchins are animals that are typically small and round. They have hard, spiny shells.

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Sea urchins usually tend to move slowly and sometimes with unpredictable movements. When escaping a predator, they roll like a ball- straightforward and quick- to escape the threat.

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Algae

Plankton

Sponges

Mussels

Kelp

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the body is ovoid shaped with spines

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Sea urchins spend the vast majority of their lives foraging for food.

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Sea urchins will eat just about anything that floats by.

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it eats algae,kelp,periwinkles

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are active nocturnally, moving out of shelters at night to graze.

# data[].attributes.headline
As echinoderms, sea urchins have pentaradial symmetry. Skeleton made of calcite. Typically, the body is ovoid shaped with spines; the upper surface is domed and the underside is flattened. The mouth has a complex structure made up of five calcium carbonate plates.

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As echinoderms, sea urchins have pentaradial symmetry. Skeleton made of calcite. Typically, the body is ovoid shaped with spines; the upper surface is domed and the underside is flattened. The mouth has a complex structure made up of five calcium carbonate plates.

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Davian aw 3cr

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Many species of sea urchins are active nocturnally, moving out of shelters at night to graze. This behavior is correlated with the avoidance of visual predators; however, it also increases exposure to nocturnal predators, including lobsters and asteroids.

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Many species of sea urchins are active nocturnally, moving out of shelters at night to graze. This behavior is correlated with the avoidance of visual predators; however, it also increases exposure to nocturnal predators, including lobsters and asteroids.

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Davian aw 3cr

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Sea urchins will eat just about anything that floats by. Its sharp teeth can scrape algae off rocks, and grind up plankton, kelp, periwinkles, and sometimes even barnacles and mussels. 

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Sea urchins will eat just about anything that floats by. Its sharp teeth can scrape algae off rocks, and grind up plankton, kelp, periwinkles, and sometimes even barnacles and mussels. 

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Davian aw 3cr

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- They are invertebrates, which means they don’t have any bones
- Radially symmetrical and can be divided into five equal parts
- Do not have a recognizable face, but an identifiable mouth and anus
- They do not have eyes
- They can be many colors, including black, brown, right pink, dark purple, green, and sand colored
- Scattered on their spines are claw-like structures called pedicellaria                                                                                    - In a sea urchin’s mouth, there are five rigid teeth made of calcium carbonate and another structure acting as a tongue  - They have five rows of paired tube feet
- Sea urchins  have shells and soft inner body parts.

- They do not have a brain
-Average sea urchin is 3 to 10 centimeters in diameter
Egan

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-sea urchins sense light and respond to it.                               - The Pedicellariae have three uses: gathering food, defending themselves against predators, and keeping their body clean.   - they have a suction to attach themselves to rocks or similar surfaces.

Egan

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-sea urchins eat both plants and meat of animals.                      -Their diet mainly consists of algae, seaweed, and plankton from nearby underwater rocks and corals.                                    -They also feed on decomposing matter from fish at times.

Egan