This is not the pirates, which we are used to see in movies. They are well armed and have quite fast boats. Piracy is a very lucrative "business". If they manage to seize a boat, they can get ransom money of millions of dollars for the vessel, crew and cargo. Despite the presence of military patrols in the Gulf of Aden, they still attack boats. Kenya, Yemen and Somalia are very poor, so piracy is a major source of income for many inhabitants of these countries.