Movie S5.

Fluid walls withstand forces exerted by living worms at room temperature (a frame from this movie is illustrated in Fig. 4Ei). An 8 x 8 grid (chambers 2 x 2 mm) was made using S medium + 0.03 mg/ml BSA, bacteria added as food, dishes left at room temperature, worms washed in S medium and transferred to new chambers, and living worms imaged.