Sand Dollars and Sea Biscuits on the Coast
Tourists come to visit and love to comb the beaches for sea treasures. Certain times of the year, sand dollars and sea biscuits wash ashore. Although the sand dollar and sea biscuit fall under the same family, they are quite different in shape and size. i get asked what is this called? Is this a Shell? Is it an animal? Id like to share some of the differences of each.
*The Distinction Between Sand Dollars and Sea Biscuits: Exploring Their Unique Characteristics and Environments**
Physical Differences:
Sand dollars are flat and round, resembling small, smooth discs that typically measure between 2 to 4 inches in diameter. In contrast, sea biscuits have a thicker, dome-like shape and can grow up to 5 inches across.
Habitats:
Sand dollars typically inhabit shallow, sandy, or muddy bottoms along coastal areas. Sea biscuits, on the other hand, favor slightly deeper waters while also enjoying sandy ocean floors.
Classification:
Both sand dollars and sea biscuits are part of the echinoderm phylum and fall under the class Echinoidea. Sand dollars are mainly found in genera such as Dendraster and Echinarachnius, while sea biscuits are usually classified under the genus Clypeaster.
Behavior and Ecology:
Sand dollars feed on tiny particles like plankton and bacteria, using their small spines to guide food toward their mouths. In contrast, sea biscuits consume algae and organic matter, utilizing their larger spines to sift through the sediment. Both of these fascinating creatures reproduce through external fertilization, releasing eggs and sperm into the surrounding water.
Conservation and Human Interaction:
These creatures are popular among collectors, which can have a negative impact on their populations. Conservation efforts aim to address this issue by establishing marine protected areas and implementing regulations on the collection of these marine animals.
Sea Biscuits:
Sea biscuits, often referred to as “sea cookies,” embody a profound connection to the ocean and its wealth. They serve as a reminder of the rich marine life and the stunning beauty of coastal environments. The thicker, sturdier structure of sea biscuits also symbolizes strength and resilience, showcasing their ability to withstand strong currents. In various cultures, sea biscuits are seen as harbingers of good luck and protection, often kept as talismans that bring positive energy.
Using treasures from the sea, I create prints and decor that can be used in a coastal theme. Sea Biscuit Napkin Rings
I just love the way they bring a tablescape to life . I hope this little article has helped in your knowledge of coastal finds.
