Sand Dollar on our Hervey Bay Beaches Alive - Sand dollars are not shells — they’re actually a type of sea urchin, closely related to starfish and sea cucumbers. The flat, round shape helps them burrow into the sand and stay from being swept away by waves. The star-shaped pattern on top is called a petaloid. It’s part of their respiratory system and helps them absorb oxygen from the water. Living sand dollars are usually dark purple, brown, or grey, not white. The white ones you find on the beac
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Sand Dollar on our Hervey Bay Beaches Alive - Sand dollars are not shells — they’re actually a type of sea urchin, closely related to starfish and sea cucumbers. The flat, round shape
Hervey Bay CoralWatch. Finnegan Tui · Denna. Sand Dollar on our Hervey Bay Beaches Alive - Sand dollars are not shells — they’re actually a type of sea urchin, closely related to starfish and sea cucumbers. The flat, round shape helps them burrow into the sand and stay from being swept away by waves. The star-shaped pattern on top is ...
71.8K views3 months ago
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