What is a seadollar?

Answer 1

A seadollar, commonly known as a sea dollar or dollar sea biscuit, refers to a type of echinoderm belonging to the class Echinoidea, specifically the order Clypeasteroida. These marine animals are characterized by their flattened, disk-shaped bodies and are typically found in sandy or muddy sea bottoms. Sea dollars are closely related to sea urchins and are often recognized for their unique, coin-like appearance and the intricate patterns on their tests, or shells. They are sometimes collected as curiosities or used in crafts due to their distinctive shape and texture.