Big Blue UKMay 10, 2016

Big Blue Week continues as Hugh Fearnley-Whittingstall takes his daily dip into the UK's extraordinary marine life. Hugh and the team are celebrating the arrival of our sharks. During summer over 30 species are found in the UK - including blue sharks, smoothhounds and basking sharks - so where and how can they be spotted? Lindsey Chapman is on the hunt for mermaids' purses - shark-egg cases that are washed up on our shore. Can she also find live shark embryos in amongst Devon's seaweed?

Big Blue UK was broadcast on BBC1 at Tuesday 10 May 2016, 18:30. This episode was initially placed on Tuesday 25 August 2015.