The Moby Dick and Morecambe

What started as an interesting chat over a glass of red wine with my dad, became somewhat of an obsession that I had to learn more about... What has Morecambe got to do with Moby Dick?! Many of you reading this may be lucky enough know exactly what I am talking about here, but for those of you who don't, it's a killer (whale)! - It was actually a sperm whale but for puns-sake...