Jul 13, 2022
In Welcome to the Forum
The scientific name of crab "Brachyuran" also revealed the process of "Crab transformation". The prefix "Brach" means short, and the suffix "Ura" refers to the tail. Therefore, the classification of crabs is actually brachyurd. As the name suggests, "Crabization" refers to the gradual degeneration of the tail during evolution. In fact, as long as we compare crabs with other decapods such as shrimps and lobsters, the process of "Crabization" becomes clear at a glance. The biggest difference is that shrimp have ghost mannequin effect service tails; crabs appear to have no tails. Crabs have evolved over the years, and the length of their tails has become shorter and shorter, and finally folded into the abdomen to become the crab navel of the plastron. In addition, "Crabization" also includes features such as a body that gradually grows shorter and more horizontal, and a flattened carapace that can make the body smaller. Crabs that can adapt to various habitats are the winners of evolution theory. Scholars attribute it to their body shape, and call this evolutionary process as crabs that can adapt to various habitats are the winners of evolutionary theory. Scholars attribute it to their body shape and call this evolutionary process "Crabization." crabization is not limited to interestingly, scholars believe that crab transformation is not limited to crabs, and some decapods also have the phenomenon of "Crab transformation", which has become more and more "Crab" during the evolution process. Examples include: hermit crabs with relatively long tails, as well as porcelain crab and king crab, also known as stone crab. They are very similar to crabs in appearance, and sometimes people think that they are also members of the crab family. The process of "Crabization" is precisely the reason why we sometimes misunderstand that they belong to the same category as crabs when we distinguish them by appearance.