👉 Sphenomalar, also known as zebrafish or zebrafish embryos, are a type of fish that have undergone partial or complete embryonic development. They are typically used in research and conservation biology to study the development and behavior of young fish. In the wild, sphenomalar embryos undergo a period of rapid development called gastrulation, which is characterized by the formation of three separate chambers: an outer chamber for the embryo's head, a middle chamber for the body,