Sarcomastigina is a group of protists within the superphylum Amoebozoa, characterized by their possession of both flagella and pseudopods. This group includes organisms that exhibit a range of forms and lifestyles, often found in aquatic environments. Sarcomastigina encompasses various genera, including some that are free-living and others that are parasitic. They play significant roles in their ecosystems, contributing to nutrient cycling and serving as prey for larger organisms.