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Fig. 1. Planula migration. Images of a single planula larva migrating toward light
were captured at the rate of 1 image per 30 s and superimposed to create one
figure. Note that the specimen oriented the blunt end of its spindle-shaped
body toward light and that contraction and relaxation of tissue along the body
axis accompanied migration. The specimen shown was migrating faster (1.2 mm
min-1) than average (0.3 mm min-1, see
Fig. 5C) thus facilitating
visualization of changes in shape and position during migration. Scale bar, 1
mm.
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