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What are sand dollars?

Updated: 10/4/2023
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12y ago

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Sand dollars are NOT a type of sea urchin, but they are related to them. They are both echinoderms meaning spiny skin. Sand dollars live on sandy bottoms, and have the shape of an extremely flattened disk. They burrow into the sand and use their tube feet to feed, and spines to crawl along the bottom. They display radial symmetry, and have a hard external test composed of calcium carbonate. In living individuals, it is this test that has a spiny covering.

Sand dollars are a type of sea urchin specially adapted to burrowing in sand. In contrast to most other sea urchins, the bodies of sand dollars are clothed with hard out sides

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12y ago
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13y ago

When a sand dollar is alive however, it is darker in color and covered by tiny, mobile spines. A sand dollar has a characteristic 5-petal design on its back

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13y ago

Many people are familiar with sand dollars that have washed up on the beach, becoming bleached by the sun to a light sandycolor. When a sand dollar is alive however, it is darker in color and covered by tiny, mobile spines.

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12y ago

There white because there dead. they be diffrent color if they were in the water.

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12y ago

it is like green or white or pink that's all a live one could be

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10y ago

The sand dollars have a thick maroon coloured skin.

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Q: What are sand dollars?
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