As a kind of unique Marine organism, sea urchin's morphology and ecological characteristics often attract the attention of biology lovers and scientific researchers. Belonging to the phylum echinoderm, sea urchins have hard shells and sharp spines, and their appearance presents a wide variety of shapes and colors, which make up their beauty and complexity. These specimens are not only of great value in scientific research, but also play an important role in the fields of art and education.
The outer shell of a sea urchin is a calcareous pentad structure,usually radially symmetrical. Its unique appearance makes sea urchins excellent specimen materials. After proper treatment and preservation after collection, specimens can maintain their original shape and color for a long time, which provides valuable information for the study of Marine ecosystems, species classification and biological characteristics
In the ecosystem, sea urchins play an important role. They are part of the seafloor food chain and maintain the ecological balance by eating algae and organic matter. The growth and reproduction cycles of sea urchins also provide rich information for scientific research. Sea urchins,for example, release eggs and sperm during the breeding season to form plankton,which goes through several stages before developing into juveniles,a process that is crucial to understanding the life cycle of Marine organisms.
From an educational point of view,sea urchin specimens provide students with intuitive learning materials. It helps students to understand the morphological characteristics of different Marine organisms and their strategies for adapting to the environment. In the classroom,by observing and studying the structure of sea urchins, students are able to better understand the basic concepts of taxonomy, ecology, and evolution of animals.

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.

Sea urchins, belonging to the phylum echinoderm, are unique creatures that live on the sea floor and are usually spherical or disk-shaped in appearance, covered with a hard calcareous shell covered with sharp spines. Sea urchins come in a variety of forms and colors, from deep purple, dark green to bright yellow, which vary from species to species, making them particularly attractive in the ocean world.

The internal structure of sea urchins is also worth mentioning. They do not have a brain or a heart, but have a complex nervous system and a powerful digestive system. The mouth of the sea urchin is located at the bottom, in the shape of a five-pointed star, surrounded by unique chewing organs, known as the "sea urchin mouth". This structure allows them to feed on algae, mosses and microscopic Marine life, demonstrating their important role in the food chain in the ecosystem.

During the taxidermy process, the urchin's shell is carefully treated to maintain its original color and shape. First, fresh sea urchins are washed to remove the internal soft tissue to avoid decay and odor. It is then placed in a diluted acetic acid solution to remove dirt and sediment from the calcareous shell, and finally dried and finished. After these procedures, the specimen of sea urchin can not only perfectly preserve its form, but also become a work of art showing the beauty of nature.

In the field of education and research, sea urchin specimens are widely used in the study of biology and ecology. They help students and researchers better understand the ecology, habits and interactions of Marine life with the environment. At the same time, sea urchins are often used in folk art and handicrafts, and the unique shape of sea urchin shells is often used as decorations and is loved by people.