Fisherman and crab aboard the Newlyn Crabber the 'William Harvey'.

The crabs are mainly female and are taken back to Newlyn the same day, where they are stored in sea water holding tanks for a short period of time before they are processed.

Shellfishing does not damage the environment and anything caught that isn't big enough is returned to the sea alive to carry on breeding.

W. Harvey & Sons, who own the boat and processing sites in Newlyn, are the UK's largest shellfish provider.