Sea urchins are unique creatures in the ocean, and their shape and structure are often striking. The outer shell of the sea urchin appears in a variety of colors, from lavender to dark green, and some species even have gorgeous spots. These shells are made of hard, calcareous material and thus have a certain defensive capability that allows them to defend against predators in their natural environment.

The body structure of a sea urchin is relatively simple, usually appearing spherical and surrounded by sturdy spines. The spines are not only their defensive weapon, but also help them maintain their balance in a way when moving around the bottom of the ocean. They have a mouth on their belly surrounded by small spines that help them catch tiny foods such as algae and plankton.

As a specimen, the shell of the sea urchin is valued in the fields of art and education. Due to their unique form and color, many specimens of sea urchins have been used in exhibitions, attracting the attention of visitors. By looking at specimens of sea urchins, we can more intuitively understand their biological characteristics and their relationship to the surrounding environment. The preparation process usually involves washing and treating the urchin's shell to ensure that its color and form remain in optimal condition for study and appreciation.

The ecological role of sea urchins cannot be ignored either. They serve as important food chains in Marine ecosystems, both as a source of food for other organisms and as a means of controlling the growth of Marine plants by feeding on algae. Therefore, the existence of sea urchins not only enriches Marine biodiversity, but also plays an important role in maintaining ecological balance.

For those who love nature and Marine life, the specimen of sea urchin is undoubtedly an interesting work of art and wonders of nature. They come in a variety of shapes and colors, showing the infinite creativity of nature.