Sea Urchins

Cover the affected area with vinegar once you get out of the water. Soak a lint-free towel in vinegar and hold it on there as long as possible.

Purple sea urchins live in close association with kelp forests. Kelp is their primary food.

they give birth~ Sea urchins generally have separate sexes and spawn seasonally every year. Eggs and sperm are usually released to the water column where fertilisation occurs.

this this is a girls from il. who wants to know how long sea urchin's live yes, sea urchins live in hawia =)

It lodges itsef into holes or crevases

They eat algae, mussels, small fish, brittle stars, sponges, and crinoids.

yes,they have stings or spikes,which they use to inject poison to their attackers.

Yes sea urchins are posibly to be called caniballs.

even these animals are stealth like enough to

catch small fish that swim by.

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yes

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They look like a normal eye except the white in a sea urchin is blue and have bright yellow eye coloring.

sea urchins

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. :(

Echinoderms are not 'grouped' with the starfish and sea urchins. Rather echinoderms are the animal phylum to which starfish and sea urchins belong to. Star fish belong to the class Asteroidea and sea urchins belong to the class Echinoidea. There are other echinoderm classes such as sea cucumbers (Holothuroidea) and brittle stars (Ophiuroidea) are two of them. All these classes fall under the Echinoderm phylum.

All echinoderms share some distinguishing features:

1. Their adult bodies are arranged in five equal parts

2. They have an internal calcium carbonate skeleton

3. They have a mouth, but no head or brain (they do have a nervous system)

4. They can posses tube feet for locomotion

5. They posses a internal hydraulic system consisting of tubes of sea water to regulate the body's internal pressure and to control movement feeding and respiration.

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In December 1991 urchins from Maine were bringing fishermen about 40 cents per pound.

look on docks on the poles.

With aids

No. Techniqley, these sea creatures are cold blooded and have a particulated nervouse systems.

sea star males don't give birth only the females

No. Sea urchins live in the sea.

salt water

sea urchins are species which belongs to phylum echinordermata, class ecinoidia.

Normally every echinodermates has water vascular system. And sea urchin, yes it is. It has water vascular system.

plankton and detritus (fallen particles from the ocean that collect at the bottom)