Sea Cookie

Clypeaster subdepressus

Markings and exact colorations may vary.

A large, domed, thick-shelled relative of the sand dollar, sometimes over six inches across.

Typical size
3–8 in
How often it turns up
Uncommon
Collecting
Restricted

Only collect empty tests.

Handling
May be alive

How to tell it apart

  • Thick domed profile, not flat
  • No slots through the test
  • Broad five-petal pattern on top

Where to find these in Florida

Beaches rated very good or excellent for sand dollars. Each page shows today’s score, the best window and access details.

Found one?

Photograph it and BeachNut ranks the likely matches with a confidence read, then logs it to your collection with the beach and date.

Browsing beaches and the full field guide is free. A free account logs unlimited finds and gives you three photo identifications a day.

More sand dollars in the field guide

Browse every sand dollars in the guide

Get Florida beachcombing tips

Occasional emails: what's washing up, shelling tips and new BeachNut features. No spam, unsubscribe any time.