Fancy this for lunch: sea cucumber tea? Wolffish and chips? Trout candy floss and chocolate starfish? Heston turns to the sea in this special episode of Feast. Across the world's seas, fish stocks are dwindling. If current trends continue, many will collapse completely in the next 50 years. But to super chef Heston Blumenthal this isn't the time for doom and gloom - this is the culinary opportunity of a lifetime. He is certain the sea is full of delicious, unused alternatives to our traditional fish suppers.