By keeping a thin skeleton, the sand dollar can camouflage itself in the sand.
Explanation:
Sand dollar is an exoskeleton type of animal that lives in the close to the seashore or under fine sand on a level terrain. It name came to be as a result of the shape of a silver dollar which it took and can live up to 6 - 10 years in a given lifespan.
In general, pacific sand dollars will bury themselves in the sand to avoid being feed upon (predation) by fish and invertebrates.
By keeping a thin skeleton, the sand dollar can camouflage itself in the sand.
Explanation:
Sand dollar are very small and peculiar sea urchins. They have very few predators like some fish and starfish, but they manage to get rid of predation with their own bodies, which is very useful for such a small creature. This is because sand dollars have small spines on their bodies, which in addition to allowing them to move forward on the ocean floor with great speed, allows them to hide in the sand, preventing their predators from finding them.
