
Sand Dollar
Uncover the secrets of playful flat discs beneath the waves!

The Basics
Scientific Name
Clypeasteroida
Conservation Status
Not evaluated
Location
Oceans worldwide
Average size
3 to 4 inches wide
diet
Plankton, algae, detritus
lifespan
6 to 10 years
Let’s Explore
Overview
Sand dollars are adorable creatures that live on the ocean floor. They belong to a group called echinoderms, which also includes starfish and sea urchins. When you look at them, they appear like flat, round discs that measure about 7.5 to 10 centimeters (3 to 4 inches) wide.
These fascinating invertebrates thrive in oceans around the world, often hiding just beneath the sand. They munch on tasty treats like plankton, algae, and detritus, which are tiny bits of organic matter that fall to the sea floor.
Did you know that sand dollars have a star-shaped design on their top side? This unique pattern becomes visible when the sand dollar dies and its hard skeleton washes ashore. Kids love to collect these beauties, and they make great decorations for your beach-themed art projects.
Sand dollars can live for about 6 to 10 years, depending on their environment. While they seem delicate, they are survivin’ champions that thrive in sandy habitats where they dig under the surface to protect themselves from strong currents.
When sand dollars reproduce, they go for a real splash! They release up to a million eggs into the water, where fertilization occurs. Each tiny larva dances in the open ocean before settling down, growing into the familiar shape we see on the beach later.
Where can you find a Sand Dollar in the wild?
What does a Sand Dollar eat?
How big can a Sand Dollar grow?
How long does a Sand Dollar typically live?
What is the conservation status of the Sand Dollar?
What are the main threats to the Sand Dollar?
wowzerful facts
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