planária
Planaria are a group of free-living flatworms belonging to the class Turbellaria, though this classification is now considered paraphyletic. They are found in both freshwater and saltwater environments, as well as terrestrial habitats, typically in damp conditions. Planarians are characterized by their dorsoventrally flattened bodies and a distinct head with two eyespots that detect light. They possess a pharynx, which is everted from a ventral opening, used to ingest food.
A remarkable feature of planarians is their extraordinary regenerative ability. If a planarian is cut into
Planarians are carnivorous or scavengers, feeding on small invertebrates, dead organic matter, and algae. They move