Photo: Beaches of Socorrito. Baja California , Mexico.  Family:   Dendrasteridae Genus:  Dendraster  Species: Dendraster excentricus  (Common name: Eccentric sand dollar)  Range: Alaska to Baja California. Habitat: On sand bottoms of sheltered bays and open coasts; from low-tide to water 130’ (40m) deep.   Source : Pacific Coast, The Audubon Society Nature Guides.  
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Photo: Beaches of Socorrito. Baja California , Mexico. 

Family:   Dendrasteridae

Genus:  Dendraster 

Species: Dendraster excentricus  (Common name: Eccentric sand dollar) 

Range: Alaska to Baja California.

Habitat: On sand bottoms of sheltered bays and open coasts; from low-tide to water 130’ (40m) deep.  

Source : Pacific Coast, The Audubon Society Nature Guides.  

emmy1017: The sand dollar is an ocean animal related to the star fish and sea urchin. Look at the top surface and find the holes that form the star shape. Tube feet stuck out from these holes and were used for breathing and eating. At the back of the shell is the mouth area where the sand dollar took in small particles of sea plants and sea animals. The five jaws found inside (the doves) crushed the food. Small purplish spines once covered the body and helped it wiggle through the sand water. By Emmy , Check out her blog at http://emmy1017.tumblr.com
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emmy1017:

The sand dollar is an ocean animal related to the star fish and sea urchin. Look at the top surface and find the holes that form the star shape. Tube feet stuck out from these holes and were used for breathing and eating.

At the back of the shell is the mouth area where the sand dollar took in small particles of sea plants and sea animals. The five jaws found inside (the doves) crushed the food. Small purplish spines once covered the body and helped it wiggle through the sand water.

By Emmy , Check out her blog at http://emmy1017.tumblr.com