👉 Echinosigna, also known as echinogaster or echinoderm, is a type of soft-bodied invertebrate that belongs to the class Chondrichthyes and is primarily found in marine environments. It includes various forms such as echinoids, chrysochlorids, and pseudochrysochlorid species. Echinoid chelidoscorata (echinoids) are characterized by their transparent shells, which serve as protective structures for the internal
