Scientists believe the five eyes of Opabinia regalis gave it a wide field of vision across different angles, which would have been a significant advantage in the complex, predator-filled waters of the Cambrian sea. Two of the eyes appear to have faced forward or upward while others provided coverage from different directions. This multi-eyed arrangement is not unique to Opabinia, as many Cambrian animals experimented with unusual sensory configurations, but five eyes in a single creature remain one of the most striking examples. It is a reminder of just how different and experimental early animal life was, long before evolution settled on the body plans we see in creatures today.

Most paleontologists think Opabinia regalis was likely a predator or an opportunistic feeder rather than a pure scavenger. Its long frontal appendage, often described as resembling a vacuum hose, ended in a claw or grasping structure. Researchers believe it used this appendage to probe into soft sediment or capture small prey, then passed the food backward toward its mouth, which faced downward and rearward rather than forward. This feeding style is unusual even by Cambrian standards and has no direct parallel in living animals, making Opabinia one of the most fascinating examples of early predatory adaptation in the fossil record.

Fossils of Opabinia regalis were first collected from the Burgess Shale in British Columbia in the early twentieth century, but the animal was not formally and fully described until 1975, when paleontologist Harry Whittington published a detailed study. When he presented his findings to a scientific audience, the reaction was reportedly laughter, because the reconstruction looked so bizarre and unlike anything alive or previously known. The name Opabinia comes from Opabin Pass, a mountain pass near the Burgess Shale site. The discovery and subsequent study of Opabinia regalis played a major role in reshaping how scientists understand Cambrian animal diversity and the deep roots of the arthropod lineage.

Opabinia regalis does not belong to any surviving animal phylum, but current research places it close to the evolutionary lineage that gave rise to the arthropods, the group that includes today's insects, crustaceans, and spiders. It is considered part of a broader category of Cambrian animals sometimes called radiodont relatives, a group that also includes the more famous Cambrian sea creature Anomalocaris. While Opabinia itself left no direct living descendants, studying it helps scientists piece together the evolutionary steps that eventually produced the most species-rich group of animals on Earth. In that sense, every insect and crustacean alive today carries a distant echo of the Cambrian ocean world that Opabinia once inhabited.

Opabinia regalis has become a beloved figure across paleontology communities, science education platforms, and collector circles for several reasons. Its appearance, with five eyes and a claw-tipped frontal tube, is so outlandish that it immediately captures attention. It features prominently in popular science books, documentaries, and social media posts about the Cambrian Explosion, one of the most discussed events in evolutionary biology. Museum gift shops and independent makers have embraced it as a subject for merchandise, and the rise of science plush toys and prehistoric animal plush toys as a collector category has brought renewed mainstream attention to creatures like Opabinia. It has also gained traction as a symbol of how strange and wonderful real science can be, often shared by educators and enthusiasts as proof that truth is stranger than fiction.