It is not always a "pretty" sight - the mudflats at low tide. I find them fascinating and each day it is different.
At low tide there are often worm gatherers hunting for worms for the fishermen. They wade out throught the mudflats wearing long rubber boots, carrying a garden fork, and a bucket. They must obey some strict rules about turning the sods to find the worms, and returning the sod to the area they took it from.
These worms are highly prized by fishermen - so fetch a good price.
When the tide comes it, and goes out again, there should be little sign that the wormers have been although they know not to harvest from the same area constantly.