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A turning-escape reaction in response to air bubbles and other factors results in a 180° turn in a confined space within 1.5 s. The measured rate under test conditions is 250 μm/s. The calculated maximum rate of locomotion is 420 μm/s. The animals undergo approximately 4 complete cycles per second. Each cycle results in two power and two recovery strokes. The second antennae and mandibles undergo coordinated cyclic movements. This creates a downward force enabling the endopods to gain purchase on the ventral substrate. During a locomotory cycle, the exopods of the second antennae and mandibles are directed dorsolaterally against a dorsal substrate.

The biramous second antennae and mandibles are the force-generating appendages.

Locomotion is completely dependent on the presence of dorsal and ventral substrates. typica was undertaken to demonstrate how this species progresses through the interstitial spaces. A cinemicrographic analysis of the functional morphology of locomotion in the mystacocarid D.

The crustacean class Mystacocarida is restricted to the interstitial marine sand environment.

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