Series of underwater shots; CSs of a flatfish moving along bottom of murky water of estuary (33 ft). CS of crab moving through reeds (22 ft). CSs of flatfish swimming near bottom or remaining motionless partially buried in sand (46 ft). Brief shot of flatfish (plaice) partially buried in sand then suddenly swimming away (6 ft). CSs of fish near bottom (61 ft). CSs of hermit crab (33 ft). CSs of flatfish in murky water (22 ft). CS of flatfish (plaice) in murky water (12 ft). CS of shells (8 ft). CS of snail (22 ft).