From pirates to people smugglers, enslaved crews and dodgy fishing practices, the world's oceans are home to widespread and largely unchecked illegality.
Pulitzer Prize-winning investigative journalist Ian Urbina has spent five years documenting the lawless behaviour flourishing on the high seas in his book The Outlaw Ocean.
He's also set up a non-profit journalism organization called The Outlaw Ocean Project dedicated to publishing more stories about life and conditions on board the global shipping fleet.