| Opabinia is one of the more unusual animals found in the Cambrian fossils, it has no known living relatives although it has been suggested that tardigrades are related. In form it appears to be related to anomalocaris and the lobopods and the side lobes and gills have been interpreted as the possible precursors of the classic arthropod biramous limbs. |
The side lobes were probably used to swim in the water above the mud while it's peculiar trunk-like structure was probably used to grasp and transport food to the mouth. The five eyes are another feature which makes this creature stand out from the others.