Files in this Data Supplement:

• Movie 1 -

  Movie 1. C-start

  Loligo opalescens squid initiates movement from hovering in place by bending its arms perpendicular to the anterior-posterior axis and then snapping the arms back to a position parallel with the long axis of the body, in conjunction with a mantle inhalation and then a jet escape.  Similar to the C-start of fish used to overcome the intertial forces of starting movement from rest.

• Movie 2 -

  Movie 2. Toroid

  Loligo opalescens squid is jetting backwards fast, it then stops by braking with its fins and bending its funnel back toward the mantle tip to jet forward.  It then ejects ink, allowing an in situ dye study of the jet expulsion of a toroid, a small turbulent package of water that rolls up into a coherent vortex ring.

• Movie 3 -

  Movie 3. Jet sink

  Loligo opalescens jet-and-sink sequence illustrates the coordinated timing

  of vertical position in the field of view, velocity, and mantle contraction.

• Movie 4 -

  Movie 4. Juvenile swimming

  Juveniles have bell shaped mantles and large eyes and small arms compared to mantle length.  With each jet the viscosity of the water impedes their motion.

• Movie 5 -

  Movie 5. Adult swimming

  Adults have longer rocket shaped mantles with smaller eyes and longer arms compared to mantle length.  Their larger size is apparent from the inertia they are able to generate with each jet thrust.