Kinematics of sea star legged locomotion

We took video of ambulating seastars, Asterias forbesi, in a plexiglass raceway. There were two cameras simultaneously recording from the side and from underneath at a nominal frame rate of 30 Hz. There are 128 pairs of side and bottom films and 54 unique seastars each filmed one to several times. Open Source Physics software called Tracker 5.1.3 by Douglas Brown was used to track the apical point from the side and the mouth from the bottom. The data files give 5 columns: time, x position from the bottom view, y position from the bottom view, x position from the side view and z position from the side view. The name of each file indicates which seastar that file pertains to and also gives the DSC number that indexes the pair of side and bottom film data in each file. There is also one file that gives the mass of each sea star filmed and the underwater weight of each sea star.