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Fig. 6. Phase shifts between the contraction cycle of the mantle and the
contraction cycle of Point A on the anterior vena cava (AVC). Full expansion
of the mantle is arbitrarily set at 0° and time proceeds clockwise. The
heavy black line starts at the full contraction of Point A (AVC) and ends at
the full expansion of Point A. The heavy grey line starts at full mantle
contraction and ends at full mantle expansion. Each concentric circumference
represents the averaged data of a different cuttlefish.