Sea urchin is an animal without cervical vertebra. There are many kinds. In the distant past, more than 5000 kinds of sea urchin fossils were found. Sea urchins have a delicate shell, which is covered with many thorn like things called spines. These spines can move. Their function is to keep the shell clean, move, dig sand and mud, etc.
Sea urchins, which are popular all over the world, are favored by more and more people. What parts of sea urchins do we eat? There may not be many friends who know. The sea urchin yellow we eat is actually the gonad of sea urchins. Both male and female sea urchins will have golden and attractive sea urchin yellow in the breeding season.