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QuickTime Video
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(1) Young cuttlefish, Sepia pharaonis, on substrate of checkerboard with checker sizes of 2.6, 6.5, 13.0, 19.5 and 26.0 mm.
(2) Young cuttlefish, Sepia pharaonis, on substrate of checkerboard in which the checker size was constant (13.0 mm) but the black/white contrast was 10, 20, 30, 50 or 100 %.
(3) Young cuttlefish, Sepia pharaonis, on substrate in which the number of white squares (13.0 mm each side, 100 % contrast) was 0, 4, 20, 40 or 80.
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