Turbellaria
Turbellaria:
Turbellaria, or free-living flatworms, are parasitic organisms. They too have no skeletal system. These worms rely on crawling for movement. These worms also lack a circulatory and excretory system, and they require aquatic environments to survive. They are usually non parasitic, and can be found in fresh water, saltwater, and, less often, moist soil. They feed on protozoa, bacteria, crustaceans, smaller worms, and animal and plant matter.
Turbellaria, or free-living flatworms, are parasitic organisms. They too have no skeletal system. These worms rely on crawling for movement. These worms also lack a circulatory and excretory system, and they require aquatic environments to survive. They are usually non parasitic, and can be found in fresh water, saltwater, and, less often, moist soil. They feed on protozoa, bacteria, crustaceans, smaller worms, and animal and plant matter.