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They do, which keeps the sea urchin strong and not brittle.

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โˆ™ 2010-11-02 23:35:32
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Q: Do purple sea urchins have an exoskeleton?
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How many purple sea urchins are there?

there are excatly 3million purple sea urchins


What colors are sea urchins?

Sea urchins are purple, red, orange, yellow/orange, and a mix of red and purple.(Sea Urchins come in many shapes sizes and colors.)


What color are urchins?

Sea urchins are purple, red, orange, yellow/orange, and a mix of red and purple.(Sea Urchins come in many shapes sizes and colors.)


Where do purple sea urchins live in nature?

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


How big are purple sea urchins?

10 cm


Is a sea urchin a arthropod?

No. Sea urchins are echinoderms, meaning, appropriately enough, "spiny skin". Some of the characteristics of arthropods are jointed appendages, an exoskeleton, and a segmented body. While the hard test, or shell, of sea urchins could be thought of as an exoskeleton, sea urchins have no jointed appendages and do not have a segmented body. Some examples of arthropods are shrimps, crabs, lobsters, and insects.


What are the sea urchins color?

There is not an exact colour but, black, red, purple, and green are some of the most common colours you will see on a sea urchins.


Do baby purple sea urchins get fed?

They get no parental care at all.


How long do purple sea urchins live?

It lives to be about 30 years.


What color is a purple sea urchins spines?

The spiky spines of purple sea urchins range in colours depending on the exact species and the maturity of the urchin. They can range from light blue, dark blue, royal blue, indigo, light purple, violet and dark purple.


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.


Are sea urchins fish?

No, because they do not have a backbone. All fish are vertebrates, with a backbone inside, something like your own backbone. Sea urchins are invertebrates...they have an 'exoskeleton' which is a fancy way of saying that their 'bones' are on the Outside, not the Inside.

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