Why did Hades create the Kraken?

Could you elaborate on the reasons behind Hades' decision to create the Kraken? Was it a strategic move to gain an upper hand in the underworld's power struggle? Or perhaps it was a twisted experiment, a testament to his mastery over dark forces? The enigmatic nature of this mythical creature piques my curiosity. Did Hades envision the Kraken as a tool to terrorize mortals and the gods alike, or was it a means to safeguard his realm from external threats? The motivations behind this creation remain shrouded in mystery, begging for a deeper exploration.