A guide for you to know about sand dollar

If you’ve ever wandered down a desolate beach pondering the nature of existence, instead of staring up at the sky, take a look at the soil under your feet. You could just strike gold and come upon a sand dollar! When the majority of people think of sea urchins, they envision terrifying, thorny creatures that live under the ocean’s surface. Sea urchins, on the other hand, come in a range of colours and sizes. Sand dollars come in a variety of varieties and species and are properly classified in the order Clypeasteroida, which is the scientific classification for sand dollars. Read below what’s a sand dollar all about.

Why sand dollar called sand dollar?

Although weird, the term “sand dollar” is peculiar and dates all the way back to centuries ago, when explorers began finding these unusual “rocks” washed up on beaches worldwide. Due to their resemblance to the massive coins in circulation at the period and their repeating design, they were dubbed “coins of gold.” 

Apart from the catchy moniker “sand dollar,” these sea urchins happen to be referred to by a number of different names, depending on their location around the world. Two examples are pansy shells and sea biscuits. These sand dollars have a tough exterior shell that is covered in exceedingly fine hairs, giving them their unique look. Surprisingly, those minuscule hairs are also covered by other, even smaller hairs called cilia. Sand dollars rely on this elaborate structure to navigate the ocean floor in search of food, and it is one of the most complex structures on the world.

Source of existence

Due to their proclivity for digging into the earth, sand dollars prefer to live just under or on top of sandy or muddy settings. Sand dollars, on average, have a life expectancy of 7-10 years, which can be established by examining the rings on the bottom of its shell, much like a tree’s life expectancy! They are, however, incapable of retaining their posture after death. Finally, these urchins are unearthed and washed toward the shore by the tides. They will begin to lose hair on the outside of their shells, or it will be consumed by aquatic scavengers. Now you know what’s a sand dollar and its existence into sea sides.


Adrian O'Connor is a passionate business writing coach and a creative copywriter. He is out there to make Business classes more interesting for all the students out there.