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Answered 2012-05-03 23:53:59

because the crab needs the sea urchin for protection and the sea urchin needs the crab for food

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What are the enemies of the sea urchin?

crabs sun flower starthe crabs are as big as a rockthey are stars

Can a sea anemone live with a sea urchin?

I think a sea anenome and a sea urchin can live together because i have a little aquarium and there is a sea urchin and and a sea anenome (if that's how you spell it) living in there and they were perfectly fine. BUT if you have a sea urchin do not have any crabs in there, because my sea urchin killed one, and almost killed another one by taking its claw off. :(

Is a sea urchin a omnivore?

a sea urchin is a producer

What are some animals in the intertidal zone?

Some animals are:Sea Starisopodsmusselsanemonechitonsalgaelimpetsnudibranchsea urchinclamscrabshermit crabsshrimp and many more

What class are sea urchin?

The classification of a Sea Urchin is Echinoidea

What kind of invertebrate is a sea urchin?

A sea urchin is an echinoderm

What eats purple sea urchin?

There are several animals that eat sea urchins. Sea otters, sunflower stars, snails, crabs and some species of fish predate upon sea urchins.

What is the scientific name of a sea-urchin?

There are many species of sea urchin but all sea urchins belong to the class Echinoidea.

How did the sea urchin became endangered?

how did the sea urchin became endengered

How does the sea urchin moves?

A sea urchin does move, but not very frequently.

Is a sea urchin a vertebrate?

A sea urchin is an invertebrate not a vertebrate

What type of creature is a sea urchin?

a sea urchin is a invertebratebecause it does not have a backbone

What is a see urchin?

a sea urchin is a spiky, prickly thing that lives in the sea like sea cucumbers.

Which animals are predators of the sea urchin?

They are usually sunflower stars, sea otters, some snails, some crabs, some birds and some fishes (including wolf eels).

Is sea urchin a plant?

An urchin is a marine invertebrate.

What is a sea urchin?

The sea urchin is an aquatic animal, very strange - Echinus melo.

Scientific name of sea urchin?

Sterechinus neumayeri scientific name of sea urchin

How is a sea urchin adapted to its habitat?

It urges the sea to adapt to IT! The litle urchin urger.

How does a sea urchin affect people?

Spines of the sea urchin can cause injuries of the skin.

What organism is close to a sea urchin?

Answer So far the closest animal to the sea urchin is the starfish (seastar). Sea cucumbers and sand dollars are also closely related to the sea urchin.

Is the purple sea urchin an invertebrae?

of course it is! look up sea urchin in the da dictionary!!!

Is a sea urchin a first or second level consumer?

A sea urchin is a first level consumer

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