Genus Sagitta is a class of marine organisms that are generally characterized by their streamlined, arrow-like shape. Synonyms for the term include "arrow worms," "chaetognaths," and "sagittae." Arrow worms are typically small and translucent, with a pair of fins that enable them to move through the water with considerable speed and agility. They are considered important members of the marine ecosystem, serving as both predators and prey for a variety of other organisms. Other synonyms for Genus Sagitta include "spoon worms," "arrowtail," "sagitta larvae," and "acorn worms." These names reflect the varied appearances and life cycle stages of the organisms in this group.