Onychophorans, also known as velvet worms, are soft-bodied, segmented invertebrates found in moist, tropical environments. They belong to the phylum Onychophora and are characterized by their velvety texture and numerous legs. These creatures are primarily nocturnal and use their slime glands to capture prey, which mainly consists of small insects. Onychophorans are considered a link between arthropods and annelids, showcasing features of both groups. They have a unique respiratory system that relies on tracheae, similar to insects, and exhibit a body plan that reflects their evolutionary history. Their study provides insights into the evolution of terrestrial life.