These days we understand the phrase “sea change” to reflect something new and positive in one’s life. It is frequently used to describe a significant transformation in a person or in one’s lifestyle.

In Australia, it has also come to mean a physical move from the city or the country to live closer to the ocean, or even taking a holiday at the beach. 

The phrase hasn’t always had such positive associations. 

In Act 1, Scene 2 of Shakespeare’s play ’The Tempest’, Prospero’s familiar spirit Ariel sings a song that makes Ferdinand believe that his father, Alonso, has drowned in a shipwreck, and that his father is buried at sea “full fathom five”, or five fathoms deep. Through the action of the water on his remains, his body is undergoing substantive changes: his eyes are turning into pearls and his bones into coral. There is nothing left of him that has not been transformed by the sea. 

Even worse, this story of the shipwreck and drowning is not true. It is, in fact, a ruse by Prospero to orchestrate a marriage match between his daughter, Miranda, and Ferdinand. Prospero is quite comfortable with using trickery and misleading magic to achieve what he wants to, and this is not the only time during this play that he willingly deceives others to get what he wants. 

So, even though it does still reflect a significant transformation, it has much darker connotations than the term does now. Deceit, manipulation, grief and emotional blackmail all factor into the origins of this phrase that we use so differently today.