Like its contemporary, Anomalocaris, Opabinia had segmented lobes on the sides of its body and a tail-fan, both presumably used for swimming. However, there are also important differences: Opabina was much smaller at 1½ to 2¾ inches (4 to 7 centimeters) in length, it had five eyes, and it had a very long hollow proboscis ending in a claw-like structure.
Like Anomalocaris, there has been much debate about how to classify Obabinia, although it is thought that the two are related. Today Opabinia is usually considered to be a Lobopod, a member of a group of segmented worms believed to be related to Arthropods.
Opabinia was a strange marine animal that lived during the Cambrian period
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