Bilateral cavae

The octopus (plural octopuses) is a soft-bodied, eight-limbed mollusc of the order Octopoda (, ok-TO-pə-də). Around 300 species are recognised, and the order is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. [Source: Wikipedia ]

Synonyms
Bilateral venae cavae
Is A
Anomaly of inferior vena cava