👉 A malacostracan is a type of gastropod mollusk. Malacostracans are marine animals that have a shell, and they are characterized by their unique characteristics such as the presence of two pairs of eyes (oculars) which allow them to see through water, and the ability to produce an exoskeleton called a spore sac. These types of mollusks are often found in the open ocean and can be found in freshwater habitats as well. Mollus