Sea Cookie

Clypeaster subdepressus

Sea Cookie

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

Found one?

Photograph it and BeachNut will rank the likely matches, then log it to your collection.

Identify a find

Similar finds