This is how starfish stand up again when they fall on their backs. They tuck under two adjacent arms as "feet", then raise the arms above the "feet" as "hands" while supporting their weight with the fifth arm, the "head" that stays tilted back. Once the center of gravity has shifted enough they gently fall over and lower the "head".
Total elapsed time: 3 min 20 s, images acquired every 5 sec with an Epson 3100 z digital camera.
Gene Expression and Cell Biology/Biophysics Programmes, Location